isArray to native Array.isArray

isUnd(*) to native undefined === * isFunc to native typeof * === 'function' isObject to native typeof * === 'object' microtime() to native Date().getTime(); noop to native ()=>{} noopFalse to native ()=>false noopTrue to native ()=>true boolToAjax to native *?'1':'0' Underscore.js to native
2024-09-20 07:35:55 +08:00 · 2020-07-29 21:49:41 +02:00 · 2020-07-29 21:49:41 +02:00 · ea48f5060b
parent fa39c7ecba
commit ea48f5060b
72 changed files with 551 additions and 775 deletions
--- a/README.md
+++ b/README.md
@ -50,6 +50,7 @@ This fork has the following changes:
 * Removed Sentry (Application Monitoring and Error Tracking Software)
 * Replaced gulp-uglify with gulp-terser
 * CRLF => LF line endings
+* Converted underscore.js to native code
 * Ongoing removal of old JavaScript code (things are native these days)

 ### Removal of old JavaScript
@ -62,23 +63,23 @@ Things might work in Edge 15-18, Firefox 47-62 and Chrome 54-68 due to one polyf

 |js/*       	|1.14.0   	|native   	|
 |-----------	|--------:	|--------:	|
-|admin.js    	|2.130.942	|1.355.195	|
-|app.js      	|4.184.455	|3.116.673	|
-|boot.js     	|  671.522	|  109.651	|
-|libs.js     	|  647.614	|  508.324	|
+|admin.js    	|2.130.942	|1.329.869	|
+|app.js      	|4.184.455	|3.092.391	|
+|boot.js     	|  671.522	|  108.460	|
+|libs.js     	|  647.614	|  507.015	|
 |polyfills.js	|  325.834	|        0	|
-|TOTAL js   	|7.960.367	|5.089.843	|
+|TOTAL js   	|7.960.367	|5.037.853	|

 |js/min/*       	|1.14.0   	|native   	|
 |---------------	|--------:	|--------:	|
-|admin.min.js    	|  252.147	|  176.512	|
-|app.min.js      	|  511.202	|  408.169	|
-|boot.min.js     	|   66.007	|   13.380	|
-|libs.min.js     	|  572.545	|  465.247	|
+|admin.min.js    	|  252.147	|  173.226	|
+|app.min.js      	|  511.202	|  405.035	|
+|boot.min.js     	|   66.007	|   13.240	|
+|libs.min.js     	|  572.545	|  464.161	|
 |polyfills.min.js	|   32.452	|        0	|
-|TOTAL js/min   	|1.434.353	|1.063.308	|
+|TOTAL js/min   	|1.434.353	|1.055.662	|

-370.665 bytes is not much, but it feels faster.
+378.691 bytes is not much, but it feels faster.

 ### PHP73 branch

--- a/dev/App/Abstract.js
+++ b/dev/App/Abstract.js
@ -1,5 +1,4 @@
 import window from 'window';
-import _ from '_';
 import ko from 'ko';
 import key from 'key';
 import ssm from 'ssm';
@ -40,19 +39,26 @@ class AbstractApp extends AbstractBoot {
 			Events.pub('window.resize');
 		});

+		var t;
 		Events.sub(
 			'window.resize',
-			_.throttle(() => {
-				const iH = $win.height(),
-					iW = $win.height();
+			()=>{
+				// throttle
+				if (!t) {
+					t = setTimeout(()=>{
+						const iH = $win.height(),
+							iW = $win.height();

-				if ($win.__sizes[0] !== iH || $win.__sizes[1] !== iW) {
-					$win.__sizes[0] = iH;
-					$win.__sizes[1] = iW;
+						if ($win.__sizes[0] !== iH || $win.__sizes[1] !== iW) {
+							$win.__sizes[0] = iH;
+							$win.__sizes[1] = iW;

-					Events.pub('window.resize.real');
+							Events.pub('window.resize.real');
+						}
+						t = 0;
+					}, Magics.Time50ms);
 				}
-			}, Magics.Time50ms)
+			}
 		);

 		// DEBUG
@ -76,9 +82,14 @@ class AbstractApp extends AbstractBoot {
 				$htmlCL.remove('rl-ctrl-key-pressed');
 			}
 		});
-		const fn = _.debounce(() => {
-			Events.pub('rl.auto-logout-refresh');
-		}, Magics.Time5s);
+
+		var d;
+		const fn = ()=>{
+			// debounce
+			d && clearTimeout(d);
+			d = setTimeout(()=>Events.pub('rl.auto-logout-refresh'), Magics.Time5s);
+		}
+
 		$doc.addEventListener('mousemove', fn);
 		$doc.addEventListener('keypress', fn);
 		$doc.addEventListener('click', fn);
--- a/dev/App/Admin.js
+++ b/dev/App/Admin.js
@ -1,12 +1,11 @@
 import window from 'window';
-import _ from '_';
 import ko from 'ko';
 import progressJs from 'progressJs';

 import { root } from 'Common/Links';
 import { getNotification } from 'Common/Translator';
 import { StorageResultType, Notification } from 'Common/Enums';
-import { pInt, isNormal, isArray, isUnd } from 'Common/Utils';
+import { pInt, isNormal } from 'Common/Utils';

 import * as Settings from 'Storage/Settings';

@ -85,10 +84,10 @@ class AdminApp extends AbstractApp {
 					}
 				});

-				if (isArray(data.Result.List)) {
+				if (Array.isArray(data.Result.List)) {
 					list = data.Result.List.map(item => {
 						if (item) {
-							item.loading = ko.observable(!isUnd(loading[item.file]));
+							item.loading = ko.observable(loading[item.file] !== undefined);
 							return 'core' === item.type && !item.canBeInstalled ? null : item;
 						}
 						return null;
@ -205,9 +204,9 @@ class AdminApp extends AbstractApp {
 			setHash(root(), true);
 			routeOff();

-			_.defer(() => {
-				window.location.href = '/';
-			});
+			setTimeout(() =>
+				window.location.href = '/'
+			, 1);
 		} else {
 			if (Settings.settingsGet('Auth')) {
 				startScreens([SettingsAdminScreen]);
--- a/dev/App/User.js
+++ b/dev/App/User.js
@ -1,23 +1,19 @@
 import window from 'window';
-import _ from '_';
 import progressJs from 'progressJs';

 import {
-	noop,
-	trim,
 	log,
-	isArray,
-	isUnd,
 	isNormal,
 	isPosNumeric,
 	isNonEmptyArray,
 	pInt,
 	pString,
 	delegateRunOnDestroy,
-	mailToHelper,
-	jassl
+	mailToHelper
 } from 'Common/Utils';

+import { jassl } from 'Common/Jassl';
+
 import {
 	Layout,
 	Capa,
@ -129,10 +125,14 @@ class AppUser extends AbstractApp {

 		this.moveCache = {};

-		this.quotaDebounce = _.debounce(this.quota, Magics.Time30s);
-		this.moveOrDeleteResponseHelper = this.moveOrDeleteResponseHelper.bind(this);
+		let qd, o = this;
+		this.quotaDebounce = ()=>{
+			// debounce
+			qd && clearTimeout(qd);
+			qd = setTimeout(o.quota, Magics.Time30s);
+		};

-		this.messagesMoveTrigger = _.debounce(this.messagesMoveTrigger, 500);
+		this.moveOrDeleteResponseHelper = this.moveOrDeleteResponseHelper.bind(this);

 		window.setInterval(() => Events.pub('interval.30s'), Magics.Time30s);
 		window.setInterval(() => Events.pub('interval.1m'), Magics.Time1m);
@ -258,7 +258,7 @@ class AppUser extends AbstractApp {
 	}

 	recacheInboxMessageList() {
-		Remote.messageList(noop, getFolderInboxName(), 0, SettingsStore.messagesPerPage(), '', '', true);
+		Remote.messageList(()=>{}, getFolderInboxName(), 0, SettingsStore.messagesPerPage(), '', '', true);
 	}

 	/**
@ -290,25 +290,30 @@ class AppUser extends AbstractApp {
 	}

 	messagesMoveTrigger() {
-		const sTrashFolder = FolderStore.trashFolder(),
-			sSpamFolder = FolderStore.spamFolder();
+		// debounce
+		const o = this;
+		o.mt && clearTimeout(o.mt);
+		o.mt = setTimeout(()=>{
+			const sTrashFolder = FolderStore.trashFolder(),
+				sSpamFolder = FolderStore.spamFolder();

-		Object.values(this.moveCache).forEach(item => {
-			const isSpam = sSpamFolder === item.To,
-				isTrash = sTrashFolder === item.To,
-				isHam = !isSpam && sSpamFolder === item.From && getFolderInboxName() === item.To;
+			Object.values(o.moveCache).forEach(item => {
+				const isSpam = sSpamFolder === item.To,
+					isTrash = sTrashFolder === item.To,
+					isHam = !isSpam && sSpamFolder === item.From && getFolderInboxName() === item.To;

-			Remote.messagesMove(
-				this.moveOrDeleteResponseHelper,
-				item.From,
-				item.To,
-				item.Uid,
-				isSpam ? 'SPAM' : isHam ? 'HAM' : '',
-				isSpam || isTrash
-			);
-		});
+				Remote.messagesMove(
+					o.moveOrDeleteResponseHelper,
+					item.From,
+					item.To,
+					item.Uid,
+					isSpam ? 'SPAM' : isHam ? 'HAM' : '',
+					isSpam || isTrash
+				);
+			});

-		this.moveCache = {};
+			o.moveCache = {};
+		}, 500);
 	}

 	messagesMoveHelper(fromFolderFullNameRaw, toFolderFullNameRaw, uidsForMove) {
@ -336,7 +341,7 @@ class AppUser extends AbstractApp {

 	moveOrDeleteResponseHelper(sResult, oData) {
 		if (StorageResultType.Success === sResult && FolderStore.currentFolder()) {
-			if (oData && isArray(oData.Result) && 2 === oData.Result.length) {
+			if (oData && Array.isArray(oData.Result) && 2 === oData.Result.length) {
 				setFolderHash(oData.Result[0], oData.Result[1]);
 			} else {
 				setFolderHash(FolderStore.currentFolderFullNameRaw(), '');
@ -389,7 +394,7 @@ class AppUser extends AbstractApp {
 			// no default
 		}

-		bUseFolder = isUnd(bUseFolder) ? true : !!bUseFolder;
+		bUseFolder = undefined === bUseFolder ? true : !!bUseFolder;
 		if (bUseFolder) {
 			if (
 				(FolderType.Spam === iDeleteType && UNUSED_OPTION_VALUE === FolderStore.spamFolder()) ||
@ -427,12 +432,12 @@ class AppUser extends AbstractApp {
 	 * @param {boolean=} bCopy = false
 	 */
 	moveMessagesToFolder(sFromFolderFullNameRaw, aUidForMove, sToFolderFullNameRaw, bCopy) {
-		if (sFromFolderFullNameRaw !== sToFolderFullNameRaw && isArray(aUidForMove) && aUidForMove.length) {
+		if (sFromFolderFullNameRaw !== sToFolderFullNameRaw && Array.isArray(aUidForMove) && aUidForMove.length) {
 			const oFromFolder = getFolderFromCacheList(sFromFolderFullNameRaw),
 				oToFolder = getFolderFromCacheList(sToFolderFullNameRaw);

 			if (oFromFolder && oToFolder) {
-				if (isUnd(bCopy) ? false : !!bCopy) {
+				if (undefined === bCopy ? false : !!bCopy) {
 					this.messagesCopyHelper(oFromFolder.fullNameRaw, oToFolder.fullNameRaw, aUidForMove);
 				} else {
 					this.messagesMoveHelper(oFromFolder.fullNameRaw, oToFolder.fullNameRaw, aUidForMove);
@ -583,7 +588,7 @@ class AppUser extends AbstractApp {
 					sAccountEmail = AccountStore.email();
 				let parentEmail = Settings.settingsGet('ParentEmail') || sAccountEmail;

-				if (isArray(oData.Result.Accounts)) {
+				if (Array.isArray(oData.Result.Accounts)) {
 					AccountStore.accounts().forEach(oAccount => {
 						counts[oAccount.email] = oAccount.count();
 					});
@ -597,12 +602,12 @@ class AppUser extends AbstractApp {
 					);
 				}

-				if (isUnd(bBoot) ? false : !!bBoot) {
+				if (undefined === bBoot ? false : !!bBoot) {
 					setTimeout(() => this.accountsCounts(), 1000 * 5);
 					Events.sub('interval.10m-after5m', () => this.accountsCounts());
 				}

-				if (isArray(oData.Result.Identities)) {
+				if (Array.isArray(oData.Result.Identities)) {
 					delegateRunOnDestroy(IdentityStore.identities());

 					IdentityStore.identities(
@ -631,7 +636,7 @@ class AppUser extends AbstractApp {
 		Remote.templates((result, data) => {
 			TemplateStore.templates.loading(false);

-			if (StorageResultType.Success === result && data.Result && isArray(data.Result.Templates)) {
+			if (StorageResultType.Success === result && data.Result && Array.isArray(data.Result.Templates)) {
 				delegateRunOnDestroy(TemplateStore.templates());

 				TemplateStore.templates(
@ -650,7 +655,7 @@ class AppUser extends AbstractApp {
 				StorageResultType.Success === result &&
 				data &&
 				data.Result &&
-				isArray(data.Result) &&
+				Array.isArray(data.Result) &&
 				1 < data.Result.length &&
 				isPosNumeric(data.Result[0], true) &&
 				isPosNumeric(data.Result[1], true)
@ -665,7 +670,7 @@ class AppUser extends AbstractApp {
 	 * @param {Array=} list = []
 	 */
 	folderInformation(folder, list) {
-		if (trim(folder)) {
+		if (folder && folder.trim()) {
 			Remote.folderInformation(
 				(result, data) => {
 					if (StorageResultType.Success === result) {
@ -814,7 +819,7 @@ class AppUser extends AbstractApp {
 			alreadyUnread = 0,
 			rootUids = [];

-		if (isUnd(messages) || !messages) {
+		if (undefined === messages || !messages) {
 			messages = MessageStore.messageListChecked();
 		}

@ -833,7 +838,7 @@ class AppUser extends AbstractApp {
 						folder.messageCountUnread(folder.messageCountUnread() - alreadyUnread);
 					}

-					Remote.messageSetSeen(noop, sFolderFullNameRaw, rootUids, true);
+					Remote.messageSetSeen(()=>{}, sFolderFullNameRaw, rootUids, true);
 					break;

 				case MessageSetAction.UnsetSeen:
@ -846,7 +851,7 @@ class AppUser extends AbstractApp {
 						folder.messageCountUnread(folder.messageCountUnread() - alreadyUnread + rootUids.length);
 					}

-					Remote.messageSetSeen(noop, sFolderFullNameRaw, rootUids, false);
+					Remote.messageSetSeen(()=>{}, sFolderFullNameRaw, rootUids, false);
 					break;

 				case MessageSetAction.SetFlag:
@ -854,7 +859,7 @@ class AppUser extends AbstractApp {
 						storeMessageFlagsToCacheBySetAction(sFolderFullNameRaw, sSubUid, iSetAction);
 					});

-					Remote.messageSetFlagged(noop, sFolderFullNameRaw, rootUids, true);
+					Remote.messageSetFlagged(()=>{}, sFolderFullNameRaw, rootUids, true);
 					break;

 				case MessageSetAction.UnsetFlag:
@ -862,7 +867,7 @@ class AppUser extends AbstractApp {
 						storeMessageFlagsToCacheBySetAction(sFolderFullNameRaw, sSubUid, iSetAction);
 					});

-					Remote.messageSetFlagged(noop, sFolderFullNameRaw, rootUids, false);
+					Remote.messageSetFlagged(()=>{}, sFolderFullNameRaw, rootUids, false);
 					break;
 				// no default
 			}
@ -878,7 +883,7 @@ class AppUser extends AbstractApp {
 	 */
 	getAutocomplete(query, autocompleteCallback) {
 		Remote.suggestions((result, data) => {
-			if (StorageResultType.Success === result && data && isArray(data.Result)) {
+			if (StorageResultType.Success === result && data && Array.isArray(data.Result)) {
 				autocompleteCallback(
 					data.Result.map(item => (item && item[0] ? new EmailModel(item[0], item[1]) : null)).filter(value => !!value)
 				);
@ -894,7 +899,7 @@ class AppUser extends AbstractApp {
 	 */
 	setExpandedFolder(sFullNameHash, bExpanded) {
 		let aExpandedList = Local.get(ClientSideKeyName.ExpandedFolders);
-		if (!isArray(aExpandedList)) {
+		if (!Array.isArray(aExpandedList)) {
 			aExpandedList = [];
 		}

@ -1027,9 +1032,9 @@ class AppUser extends AbstractApp {
 			setHash(root(), true);
 			routeOff();

-			_.defer(() => {
-				window.location.href = customLoginLink;
-			});
+			setTimeout(() =>
+				window.location.href = customLoginLink
+			, 1);
 		}
 	}

@ -1087,7 +1092,7 @@ class AppUser extends AbstractApp {
 							routeOn();
 						}

-						if (jassl && window.crypto && window.crypto.getRandomValues && Settings.capa(Capa.OpenPGP)) {
+						if (window.crypto && window.crypto.getRandomValues && Settings.capa(Capa.OpenPGP)) {
 							const openpgpCallback = (openpgp) => {
 								PgpStore.openpgp = openpgp;

@ -1156,7 +1161,7 @@ class AppUser extends AbstractApp {
 						}, 1000);

 						setTimeout(() => this.quota(), 5000);
-						setTimeout(() => Remote.appDelayStart(noop), 35000);
+						setTimeout(() => Remote.appDelayStart(()=>{}), 35000);

 						Events.sub('rl.auto-logout', () => this.logout());

@ -1188,7 +1193,8 @@ class AppUser extends AbstractApp {
 						}

 						if (!bMobileDevice) {
-							_.defer(() => this.initVerticalLayoutResizer(ClientSideKeyName.FolderListSize));
+							const o = this;
+							setTimeout(() => o.initVerticalLayoutResizer(ClientSideKeyName.FolderListSize), 1);
 						}
 					} else {
 						this.logout();
--- a/dev/Common/Booter.js
+++ b/dev/Common/Booter.js
@ -88,7 +88,6 @@ window.__initAppData = data => {
 	const appData = window.__rlah_data(), p = progressJs;

 	if (
-		jassl &&
 		p &&
 		appData &&
 		appData.TemplatesLink &&
--- a/dev/Common/Cache.js
+++ b/dev/Common/Cache.js
@ -1,5 +1,5 @@
 import { MessageSetAction } from 'Common/Enums';
-import { trim, pInt, isArray } from 'Common/Utils';
+import { trim, pInt } from 'Common/Utils';

 let FOLDERS_CACHE = {},
 	FOLDERS_NAME_CACHE = {},
@ -266,7 +266,7 @@ export function storeMessageFlagsToCache(message) {
 * @param {Array} flags
 */
 export function storeMessageFlagsToCacheByFolderAndUid(folder, uid, flags) {
-	if (isArray(flags) && flags.length) {
+	if (Array.isArray(flags) && flags.length) {
 		setMessageFlagsToCache(folder, uid, flags);
 	}
 }
@ -280,7 +280,7 @@ export function storeMessageFlagsToCacheBySetAction(folder, uid, setAction) {
 	let unread = 0;
 	const flags = getMessageFlagsFromCache(folder, uid);

-	if (isArray(flags) && flags.length) {
+	if (Array.isArray(flags) && flags.length) {
 		if (flags[0]) {
 			unread = 1;
 		}
--- a/dev/Common/ClientStorageDriver/Cookie.js
+++ b/dev/Common/ClientStorageDriver/Cookie.js
@ -1,6 +1,5 @@
 import window from 'window';
 import Cookies from 'js-cookie';
-import { isUnd } from 'Common/Utils';
 import { CLIENT_SIDE_STORAGE_INDEX_NAME } from 'Common/Consts';

 class CookieDriver {
@ -39,7 +38,7 @@ class CookieDriver {

 		try {
 			const storageResult = Cookies.getJSON(CLIENT_SIDE_STORAGE_INDEX_NAME);
-			result = storageResult && !isUnd(storageResult[key]) ? storageResult[key] : null;
+			result = storageResult && undefined !== storageResult[key] ? storageResult[key] : null;
 		} catch (e) {} // eslint-disable-line no-empty

 		return result;
--- a/dev/Common/ClientStorageDriver/LocalStorage.js
+++ b/dev/Common/ClientStorageDriver/LocalStorage.js
@ -1,5 +1,4 @@
 import window from 'window';
-import { isUnd } from 'Common/Utils';
 import { isStorageSupported } from 'Storage/RainLoop';
 import { CLIENT_SIDE_STORAGE_INDEX_NAME } from 'Common/Consts';

@ -49,7 +48,7 @@ class LocalStorageDriver {
 			const storageValue = this.s.getItem(CLIENT_SIDE_STORAGE_INDEX_NAME) || null,
 				storageResult = null === storageValue ? null : window.JSON.parse(storageValue);

-			return storageResult && !isUnd(storageResult[key]) ? storageResult[key] : null;
+			return storageResult && undefined !== storageResult[key] ? storageResult[key] : null;
 		} catch (e) {} // eslint-disable-line no-empty

 		return null;
--- a/dev/Common/Events.js
+++ b/dev/Common/Events.js
@ -1,4 +1,3 @@
-import { isObject, isUnd } from 'Common/Utils';
 import * as Plugins from 'Common/Plugins';

 const SUBS = {};
@ -9,7 +8,7 @@ const SUBS = {};
 * @param {Object=} context
 */
 export function sub(name, func, context) {
-	if (isObject(name)) {
+	if (typeof name === 'object') {
 		context = func || null;
 		func = null;

@ -17,7 +16,7 @@ export function sub(name, func, context) {
 			sub(subName, subFunc, context);
 		});
 	} else {
-		if (isUnd(SUBS[name])) {
+		if (undefined === SUBS[name]) {
 			SUBS[name] = [];
 		}

@ -32,7 +31,7 @@ export function sub(name, func, context) {
 export function pub(name, args) {
 	Plugins.runHook('rl-pub', [name, args]);

-	if (!isUnd(SUBS[name])) {
+	if (undefined !== SUBS[name]) {
 		SUBS[name].forEach(items => {
 			if (items[0]) {
 				items[0].apply(items[1] || null, args || []);
--- a/dev/Common/Globals.js
+++ b/dev/Common/Globals.js
@ -22,8 +22,6 @@ $hcont
 	.css({ position: 'absolute', left: -5000 })
 	.appendTo($body);

-export const startMicrotime = new window.Date().getTime();
-
 /**
 * @type {boolean}
 */
@ -48,29 +46,13 @@ export const sUserAgent =
 /**
 * @type {boolean}
 */
-export const bIE = sUserAgent.includes('msie');
-
-/**
- * @type {boolean}
- */
-export const bChrome = sUserAgent.includes('chrome');
-
-/**
- * @type {boolean}
- */
-export const bSafari = !bChrome && sUserAgent.includes('safari');
+export const bSafari = !sUserAgent.includes('chrome') && sUserAgent.includes('safari');

 /**
 * @type {boolean}
 */
 export const bMobileDevice = (/android|iphone|ipod|ipad|blackberry|mobile/i).test(sUserAgent);

-/**
- * @type {boolean}
- */
-export const bIsHttps =
-	window.document && window.document.location ? 'https:' === window.document.location.protocol : false;
-
 /**
 * @type {Object}
 */
@ -148,12 +130,6 @@ export const htmlEditorLangsMap = {
 	'zh_tw': 'zh'
 };

-/**
- * @type {boolean}
- */
-let bAllowPdfPreview = !bMobileDevice && undefined !== window.navigator.mimeTypes['application/pdf'];
-
-export { bAllowPdfPreview };

 export const VIEW_MODELS = {
 	settings: [],
--- a/dev/Common/HtmlEditor.js
+++ b/dev/Common/HtmlEditor.js
@ -1,5 +1,4 @@
 import window from 'window';
-import _ from '_';
 import $ from '$';
 import { htmlEditorDefaultConfig, htmlEditorLangsMap } from 'Common/Globals';
 import { EventKeyCode, Magics } from 'Common/Enums';
@ -35,7 +34,16 @@ class HtmlEditor {
 		this.element = element;
 		this.$element = $(element);

-		this.resize = _.throttle(this.resizeEditor.bind(this), 100);
+		// throttle
+		var t, o = this;
+		this.resize = ()=>{
+			if (!t) {
+				t = setTimeout(()=>{
+					o.resizeEditor();
+					t = 0;
+				}, 100);
+			}
+		};

 		this.init();
 	}
--- a/dev/Common/Jassl.js
+++ b/dev/Common/Jassl.js
@ -8,10 +8,6 @@ import window from 'window';
 * @returns {Promise}
 */
 export function jassl(src, async = false) {
-	if (!window.Promise || !window.Promise.all) {
-		throw new Error('Promises are not available your environment.');
-	}
-
 	if (!src) {
 		throw new Error('src should not be empty.');
 	}
@ -27,7 +23,7 @@ export function jassl(src, async = false) {
 			reject(new Error(src));
 		};

-		element.async = true === async;
+		element.async = !!async;
 		element.src = src;

 		window.document.body.appendChild(element);
--- a/dev/Common/Links.js
+++ b/dev/Common/Links.js
@ -1,5 +1,5 @@
 import window from 'window';
-import { pString, pInt, isUnd, isNormal, trim, encodeURIComponent } from 'Common/Utils';
+import { pString, pInt, isNormal, trim } from 'Common/Utils';
 import * as Settings from 'Storage/Settings';

 const ROOT = './',
@ -58,7 +58,7 @@ export function rootUser() {
 * @returns {string}
 */
 export function attachmentRaw(type, download, customSpecSuffix) {
-	customSpecSuffix = isUnd(customSpecSuffix) ? AUTH_PREFIX : customSpecSuffix;
+	customSpecSuffix = undefined === customSpecSuffix ? AUTH_PREFIX : customSpecSuffix;
 	return (
 		SERVER_PREFIX +
 		'/Raw/' +
@ -160,7 +160,7 @@ export function append() {
 * @returns {string}
 */
 export function change(email) {
-	return serverRequest('Change') + encodeURIComponent(email) + '/';
+	return serverRequest('Change') + window.encodeURIComponent(email) + '/';
 }

 /**
@ -204,7 +204,7 @@ export function messageDownloadLink(requestHash) {
 * @returns {string}
 */
 export function avatarLink(email) {
-	return SERVER_PREFIX + '/Raw/0/Avatar/' + encodeURIComponent(email) + '/';
+	return SERVER_PREFIX + '/Raw/0/Avatar/' + window.encodeURIComponent(email) + '/';
 }

 /**
--- a/dev/Common/Momentor.js
+++ b/dev/Common/Momentor.js
@ -1,5 +1,4 @@
 import window from 'window';
-import _ from '_';
 import $ from '$';
 import moment from 'moment';
 import { i18n } from 'Common/Translator';
@ -7,21 +6,22 @@ import { i18n } from 'Common/Translator';
 let _moment = null;
 let _momentNow = 0;

-const updateMomentNow = _.debounce(
-	() => {
+var d, du;
+const updateMomentNow = ()=>{
+	// leading debounce
+	if (!d) {
+		d = setTimeout(()=>d=0, 500);
 		_moment = moment();
-	},
-	500,
-	true
-);
+	}
+};

-const updateMomentNowUnix = _.debounce(
-	() => {
+const updateMomentNowUnix = ()=>{
+	// leading debounce
+	if (!du) {
+		du = setTimeout(()=>du=0, 500);
 		_momentNow = moment().unix();
-	},
-	500,
-	true
-);
+	}
+};

 /**
 * @returns {moment}
@ -147,9 +147,9 @@ export function momentToNode(element) {
 * @returns {void}
 */
 export function reload() {
-	_.defer(() => {
+	setTimeout(() =>
 		$('.moment', window.document).each((index, item) => {
 			momentToNode(item);
-		});
-	});
+		})
+	, 1);
 }
--- a/dev/Common/Plugins.js
+++ b/dev/Common/Plugins.js
@ -1,4 +1,3 @@
-import { isFunc, isArray, isUnd } from 'Common/Utils';
 import { data as GlobalsData } from 'Common/Globals';
 import * as Settings from 'Storage/Settings';

@ -11,8 +10,8 @@ const SIMPLE_HOOKS = {},
 * @param {Function} callback
 */
 export function addHook(name, callback) {
-	if (isFunc(callback)) {
-		if (!isArray(SIMPLE_HOOKS[name])) {
+	if (typeof callback === 'function') {
+		if (!Array.isArray(SIMPLE_HOOKS[name])) {
 			SIMPLE_HOOKS[name] = [];
 		}

@ -25,7 +24,7 @@ export function addHook(name, callback) {
 * @param {Array=} args = []
 */
 export function runHook(name, args = []) {
-	if (isArray(SIMPLE_HOOKS[name])) {
+	if (Array.isArray(SIMPLE_HOOKS[name])) {
 		SIMPLE_HOOKS[name].forEach(callback => {
 			callback(...args);
 		});
@ -89,6 +88,6 @@ export function runSettingsViewModelHooks(admin) {
 */
 export function settingsGet(pluginSection, name) {
 	let plugins = Settings.settingsGet('Plugins');
-	plugins = plugins && !isUnd(plugins[pluginSection]) ? plugins[pluginSection] : null;
-	return plugins ? (isUnd(plugins[name]) ? null : plugins[name]) : null;
+	plugins = plugins && undefined !== plugins[pluginSection] ? plugins[pluginSection] : null;
+	return plugins ? (undefined === plugins[name] ? null : plugins[name]) : null;
 }
--- a/dev/Common/Selector.js
+++ b/dev/Common/Selector.js
@ -1,9 +1,7 @@
 import $ from '$';
-import _ from '_';
 import key from 'key';
 import ko from 'ko';
 import { EventKeyCode } from 'Common/Enums';
-import { isArray, noop, noopTrue } from 'Common/Utils';

 class Selector {
 	list;
@ -56,7 +54,12 @@ class Selector {
 		this.focusedItem = koFocusedItem || ko.observable(null);
 		this.selectedItem = koSelectedItem || ko.observable(null);

-		this.itemSelectedThrottle = _.debounce(this.itemSelected.bind(this), 300);
+		var d, o = this;
+		this.itemSelectedThrottle = (item)=>{
+			// debounce
+			d && clearTimeout(d);
+			d = setTimeout(()=>o.itemSelected(item), 300);
+		};

 		this.listChecked.subscribe((items) => {
 			if (items.length) {
@ -109,7 +112,7 @@ class Selector {

 		this.list.subscribe(
 			(items) => {
-				if (isArray(items)) {
+				if (Array.isArray(items)) {
 					items.forEach(item => {
 						if (item) {
 							const uid = this.getItemUid(item);
@ -147,7 +150,7 @@ class Selector {
 			this.focusedItem(null);
 			this.selectedItem(null);

-			if (isArray(aItems)) {
+			if (Array.isArray(aItems)) {
 				len = aCheckedCache.length;

 				aItems.forEach(item => {
@ -240,10 +243,10 @@ class Selector {
 	itemSelected(item) {
 		if (this.isListChecked()) {
 			if (!item) {
-				(this.oCallbacks.onItemSelect || noop)(item || null);
+				(this.oCallbacks.onItemSelect || (()=>{}))(item || null);
 			}
 		} else if (item) {
-			(this.oCallbacks.onItemSelect || noop)(item);
+			(this.oCallbacks.onItemSelect || (()=>{}))(item);
 		}
 	}

@ -351,14 +354,14 @@ class Selector {
 	 * @returns {boolean}
 	 */
 	autoSelect() {
-		return !!(this.oCallbacks.onAutoSelect || noopTrue)();
+		return !!(this.oCallbacks.onAutoSelect || (()=>true))();
 	}

 	/**
 	 * @param {boolean} up
 	 */
 	doUpUpOrDownDown(up) {
-		(this.oCallbacks.onUpUpOrDownDown || noopTrue)(!!up);
+		(this.oCallbacks.onUpUpOrDownDown || (()=>true))(!!up);
 	}

 	/**
--- a/dev/Common/Translator.js
+++ b/dev/Common/Translator.js
@ -1,9 +1,8 @@
 import window from 'window';
-import _ from '_';
 import $ from '$';
 import ko from 'ko';
 import { Notification, UploadErrorCode } from 'Common/Enums';
-import { pInt, isUnd, microtime } from 'Common/Utils';
+import { pInt } from 'Common/Utils';
 import { $html, $htmlCL } from 'Common/Globals';
 import { reload as momentorReload } from 'Common/Momentor';
 import { langLink } from 'Common/Links';
@ -94,11 +93,11 @@ export function i18n(key, valueList, defaulValue) {
 	let valueName = '',
 		result = I18N_DATA[key];

-	if (isUnd(result)) {
-		result = isUnd(defaulValue) ? key : defaulValue;
+	if (undefined === result) {
+		result = undefined === defaulValue ? key : defaulValue;
 	}

-	if (!isUnd(valueList) && null !== valueList) {
+	if (undefined !== valueList && null !== valueList) {
 		for (valueName in valueList) {
 			if (Object.prototype.hasOwnProperty.call(valueList, valueName)) {
 				result = result.replace('%' + valueName + '%', valueList[valueName]);
@ -138,11 +137,11 @@ const i18nToNode = (element) => {
 * @param {boolean=} animate = false
 */
 export function i18nToNodes(elements) {
-	_.defer(() => {
+	setTimeout(() =>
 		$('[data-i18n]', elements).each((index, item) => {
 			i18nToNode(item);
-		});
-	});
+		})
+	, 1);
 }

 const reloadData = () => {
@ -203,8 +202,8 @@ export function getNotification(code, message = '', defCode = null) {
 	}

 	defCode = defCode ? window.parseInt(defCode, 10) || 0 : 0;
-	return isUnd(I18N_NOTIFICATION_DATA[code])
-		? defCode && isUnd(I18N_NOTIFICATION_DATA[defCode])
+	return undefined === I18N_NOTIFICATION_DATA[code]
+		? defCode && undefined === I18N_NOTIFICATION_DATA[defCode]
 			? I18N_NOTIFICATION_DATA[defCode]
 			: ''
 		: I18N_NOTIFICATION_DATA[code];
@ -259,7 +258,7 @@ export function getUploadErrorDescByCode(code) {
 * @param {string} language
 */
 export function reload(admin, language) {
-	const start = microtime();
+	const start = new Date().getTime();

 	$htmlCL.add('rl-changing-language');

@ -292,7 +291,7 @@ export function reload(admin, language) {

 						resolve();
 					},
-					500 < microtime() - start ? 1 : 500
+					500 < (new Date().getTime()) - start ? 1 : 500
 				);
 			});
 	});
--- a/dev/Common/Utils.js
+++ b/dev/Common/Utils.js
@ -1,22 +1,15 @@
 import window from 'window';
 import $ from '$';
-import _ from '_';
 import ko from 'ko';
 import Autolinker from 'Autolinker';

 import { $win, $div, $hcont, dropdownVisibility, data as GlobalsData } from 'Common/Globals';
-import { ComposeType, EventKeyCode, SaveSettingsStep, FolderType } from 'Common/Enums';
+import { ComposeType, SaveSettingsStep, FolderType } from 'Common/Enums';
 import { Mime } from 'Common/Mime';
-import { jassl } from 'Common/Jassl';

 const trim = $.trim;
 const isArray = Array.isArray;
-const isObject = v => typeof v === 'object';
-const isFunc = v => typeof v === 'function';
-const isUnd = v => undefined === v;
-const noop = () => {}; // eslint-disable-line no-empty-function
-const noopTrue = () => true;
-const noopFalse = () => false;
+const decodeURIComponent = component => window.decodeURIComponent(component);

 var htmlspecialchars = ((de,se,gt,lt,sq,dq,bt) => {
 	return (str, quote_style = 3, double_encode = true) => {
@ -30,23 +23,14 @@ var htmlspecialchars = ((de,se,gt,lt,sq,dq,bt) => {
 	};
 })(/&/g,/&(?![\w#]+;)/gi,/</g,/>/g,/'/g,/"/g,/`/g);

-export { trim, isArray, isObject, isFunc, isUnd, noop, noopTrue, noopFalse, jassl };
-
-/**
- * @param {Function} func
- */
-export function silentTryCatch(func) {
-	try {
-		func();
-	} catch (e) {} // eslint-disable-line no-empty
-}
+export { trim };

 /**
 * @param {*} value
 * @returns {boolean}
 */
 export function isNormal(value) {
-	return !isUnd(value) && null !== value;
+	return undefined !== value && null !== value;
 }

 /**
@ -80,22 +64,6 @@ export function pString(value) {
 	return isNormal(value) ? '' + value : '';
 }

-/**
- * @param {*} value
- * @returns {boolean}
- */
-export function pBool(value) {
-	return !!value;
-}
-
-/**
- * @param {*} value
- * @returns {string}
- */
-export function boolToAjax(value) {
-	return value ? '1' : '0';
-}
-
 /**
 * @param {*} values
 * @returns {boolean}
@ -104,38 +72,6 @@ export function isNonEmptyArray(values) {
 	return isArray(values) && values.length;
 }

-/**
- * @param {string} component
- * @returns {string}
- */
-export function encodeURIComponent(component) {
-	return window.encodeURIComponent(component);
-}
-
-/**
- * @param {string} component
- * @returns {string}
- */
-export function decodeURIComponent(component) {
-	return window.decodeURIComponent(component);
-}
-
-/**
- * @param {string} url
- * @returns {string}
- */
-export function decodeURI(url) {
-	return window.decodeURI(url);
-}
-
-/**
- * @param {string} url
- * @returns {string}
- */
-export function encodeURI(url) {
-	return window.encodeURI(url);
-}
-
 /**
 * @param {string} queryString
 * @returns {Object}
@ -210,28 +146,16 @@ export function splitPlainText(text, len = 100) {
 	return prefix + result;
 }

-const timeOutAction = (function() {
+const timeOutAction = (() => {
 	const timeOuts = {};
 	return (action, fFunction, timeOut) => {
-		timeOuts[action] = isUnd(timeOuts[action]) ? 0 : timeOuts[action];
+		timeOuts[action] = undefined === timeOuts[action] ? 0 : timeOuts[action];
 		window.clearTimeout(timeOuts[action]);
 		timeOuts[action] = window.setTimeout(fFunction, timeOut);
 	};
 })();

-const timeOutActionSecond = (function() {
-	const timeOuts = {};
-	return (action, fFunction, timeOut) => {
-		if (!timeOuts[action]) {
-			timeOuts[action] = window.setTimeout(() => {
-				fFunction();
-				timeOuts[action] = 0;
-			}, timeOut);
-		}
-	};
-})();
-
-export { timeOutAction, timeOutActionSecond };
+export { timeOutAction };

 /**
 * @param {any} m
@ -247,7 +171,7 @@ export function deModule(m) {
 export function inFocus() {
 	try {
 		if (window.document.activeElement) {
-			if (isUnd(window.document.activeElement.__inFocusCache)) {
+			if (undefined === window.document.activeElement.__inFocusCache) {
 				window.document.activeElement.__inFocusCache = $(window.document.activeElement).is(
 					'input,textarea,iframe,.cke_editable'
 				);
@ -395,36 +319,6 @@ export function delegateRun(object, methodName, params, delay = 0) {
 	}
 }

-/**
- * @param {?} event
- */
-export function killCtrlACtrlS(event) {
-	event = event || window.event;
-	if (event && event.ctrlKey && !event.shiftKey && !event.altKey) {
-		const key = event.keyCode || event.which;
-		if (key === EventKeyCode.S) {
-			event.preventDefault();
-			return;
-		} else if (key === EventKeyCode.A) {
-			const sender = event.target || event.srcElement;
-			if (
-				sender &&
-				('true' === '' + sender.contentEditable || (sender.tagName && sender.tagName.match(/INPUT|TEXTAREA/i)))
-			) {
-				return;
-			}
-
-			if (window.getSelection) {
-				window.getSelection().removeAllRanges();
-			} else if (window.document.selection && window.document.selection.clear) {
-				window.document.selection.clear();
-			}
-
-			event.preventDefault();
-		}
-	}
-}
-
 /**
 * @param {(Object|null|undefined)} context
 * @param {Function} fExecute
@ -440,11 +334,11 @@ export function createCommandLegacy(context, fExecute, fCanExecute = true) {
 		return false;
 	};

-	fResult = fExecute ? fNonEmpty : noop;
+	fResult = fExecute ? fNonEmpty : ()=>{};
 	fResult.enabled = ko.observable(true);
 	fResult.isCommand = true;

-	if (isFunc(fCanExecute)) {
+	if (typeof fCanExecute === 'function') {
 		fResult.canExecute = ko.computed(() => fResult && fResult.enabled() && fCanExecute.call(context));
 	} else {
 		fResult.canExecute = ko.computed(() => fResult && fResult.enabled() && !!fCanExecute);
@ -470,28 +364,6 @@ export const convertThemeName = theme => {
 	);
 };

-/**
- * @param {string} name
- * @returns {string}
- */
-export function quoteName(name) {
-	return name.replace(/["]/g, '\\"');
-}
-
-/**
- * @returns {number}
- */
-export function microtime() {
-	return new window.Date().getTime();
-}
-
-/**
- * @returns {number}
- */
-export function timestamp() {
-	return window.Math.round(microtime() / 1000);
-}
-
 /**
 *
 * @param {string} language
@ -525,7 +397,7 @@ export function draggablePlace() {
 * @returns {void}
 */
 export function defautOptionsAfterRender(domItem, item) {
-	if (item && !isUnd(item.disabled) && domItem) {
+	if (item && undefined !== item.disabled && domItem) {
 		$(domItem)
 			.toggleClass('disabled', item.disabled)
 			.prop('disabled', item.disabled);
@ -886,7 +758,7 @@ export function folderListOptionsBuilder(

 	const sDeepPrefix = '\u00A0\u00A0\u00A0';

-	bBuildUnvisible = isUnd(bBuildUnvisible) ? false : !!bBuildUnvisible;
+	bBuildUnvisible = undefined === bBuildUnvisible ? false : !!bBuildUnvisible;
 	bSystem = !isNormal(bSystem) ? 0 < aSystem.length : bSystem;
 	iUnDeep = !isNormal(iUnDeep) ? 0 : iUnDeep;
 	fDisableCallback = isNormal(fDisableCallback) ? fDisableCallback : null;
@ -1016,9 +888,14 @@ export function selectElement(element) {
 	}
 }

-export const detectDropdownVisibility = _.debounce(() => {
-	dropdownVisibility(!!GlobalsData.aBootstrapDropdowns.find(item => item.hasClass('open')));
-}, 50);
+var dv;
+export const detectDropdownVisibility = ()=>{
+	// leading debounce
+	dv && clearTimeout(dv);
+	dv = setTimeout(()=>
+		dropdownVisibility(!!GlobalsData.aBootstrapDropdowns.find(item => item.hasClass('open')))
+	, 50);
+};

 /**
 * @param {boolean=} delay = false
@ -1055,30 +932,6 @@ export function getConfigurationFromScriptTag(configuration) {
 	return {};
 }

-/**
- * @param {mixed} mPropOrValue
- * @param {mixed} value
- */
-export function disposeOne(propOrValue, value) {
-	const disposable = value || propOrValue;
-	if (disposable && 'function' === typeof disposable.dispose) {
-		disposable.dispose();
-	}
-}
-
-/**
- * @param {Object} object
- */
-export function disposeObject(object) {
-	if (object) {
-		if (isArray(object.disposables)) {
-			object.disposables.forEach(disposeOne);
-		}
-
-		ko.utils.objectForEach(object, disposeOne);
-	}
-}
-
 /**
 * @param {Object|Array} objectOrObjects
 * @returns {void}
@ -1102,7 +955,7 @@ export function delegateRunOnDestroy(objectOrObjects) {
 */
 export function appendStyles($styleTag, css) {
 	if ($styleTag && $styleTag[0]) {
-		if ($styleTag[0].styleSheet && !isUnd($styleTag[0].styleSheet.cssText)) {
+		if ($styleTag[0].styleSheet && undefined !== $styleTag[0].styleSheet.cssText) {
 			$styleTag[0].styleSheet.cssText = css;
 		} else {
 			$styleTag.text(css);
@ -1122,7 +975,7 @@ let __themeTimer = 0,
 * @param {function=} themeTrigger = noop
 * @returns {void}
 */
-export function changeTheme(value, themeTrigger = noop) {
+export function changeTheme(value, themeTrigger = ()=>{}) {
 	const themeLink = $('#app-theme-link'),
 		clearTimer = () => {
 			__themeTimer = window.setTimeout(() => themeTrigger(SaveSettingsStep.Idle), 1000);
@ -1292,7 +1145,7 @@ export function mimeContentType(fileName) {
 	}

 	ext = getFileExtension(fileName);
-	if (ext && ext.length && !isUnd(Mime[ext])) {
+	if (ext && ext.length && undefined !== Mime[ext]) {
 		result = Mime[ext];
 	}

@ -1384,7 +1237,7 @@ export function mailToHelper(mailToUrl, PopupComposeViewModel) {

 		params = simpleQueryParser(query);

-		if (!isUnd(params.to)) {
+		if (undefined !== params.to) {
 			to = EmailModel.parseEmailLine(decodeURIComponent(email + ',' + params.to));
 			to = Object.values(
 				to.reduce((result, value) => {
@ -1404,11 +1257,11 @@ export function mailToHelper(mailToUrl, PopupComposeViewModel) {
 			to = EmailModel.parseEmailLine(email);
 		}

-		if (!isUnd(params.cc)) {
+		if (undefined !== params.cc) {
 			cc = EmailModel.parseEmailLine(decodeURIComponent(params.cc));
 		}

-		if (!isUnd(params.bcc)) {
+		if (undefined !== params.bcc) {
 			bcc = EmailModel.parseEmailLine(decodeURIComponent(params.bcc));
 		}

@ -1418,8 +1271,8 @@ export function mailToHelper(mailToUrl, PopupComposeViewModel) {
 			to,
 			cc,
 			bcc,
-			isUnd(params.subject) ? null : pString(decodeURIComponent(params.subject)),
-			isUnd(params.body) ? null : plainToHtml(pString(decodeURIComponent(params.body)))
+			undefined === params.subject ? null : pString(decodeURIComponent(params.subject)),
+			undefined === params.body ? null : plainToHtml(pString(decodeURIComponent(params.body)))
 		]);

 		return true;
@ -1445,15 +1298,15 @@ export function domReady(fn) {
 	//	}
 }

-export const windowResize = _.debounce((timeout) => {
-	if (isUnd(timeout) || null === timeout) {
+var wr;
+export const windowResize = timeout => {
+	wr && clearTimeout(wr);
+	if (undefined === timeout || null === timeout) {
 		$win.trigger('resize');
 	} else {
-		window.setTimeout(() => {
-			$win.trigger('resize');
-		}, timeout);
+		wr = setTimeout(()=>$win.trigger('resize'), timeout);
 	}
-}, 50);
+};

 /**
 * @returns {void}
--- a/dev/Component/Abstract.js
+++ b/dev/Component/Abstract.js
@ -1,7 +1,6 @@
 import $ from '$';
 import ko from 'ko';

-import { isUnd } from 'Common/Utils';
 import { i18nToNodes } from 'Common/Translator';

 class AbstractComponent {
@ -34,7 +33,7 @@ const componentExportHelper = (ClassObject, templateID = '') => ({

 				i18nToNodes(params.element);

-				if (!isUnd(params.inline) && ko.unwrap(params.inline)) {
+				if (undefined !== params.inline && ko.unwrap(params.inline)) {
 					params.element.css('display', 'inline-block');
 				}
 			}
--- a/dev/Component/AbstractCheckbox.js
+++ b/dev/Component/AbstractCheckbox.js
@ -1,5 +1,4 @@
 import ko from 'ko';
-import { isUnd } from 'Common/Utils';
 import { AbstractComponent } from 'Component/Abstract';

 class AbstractCheckbox extends AbstractComponent {
@ -10,27 +9,27 @@ class AbstractCheckbox extends AbstractComponent {
 		super();

 		this.value = params.value;
-		if (isUnd(this.value) || !this.value.subscribe) {
-			this.value = ko.observable(isUnd(this.value) ? false : !!this.value);
+		if (undefined === this.value || !this.value.subscribe) {
+			this.value = ko.observable(undefined === this.value ? false : !!this.value);
 		}

 		this.enable = params.enable;
-		if (isUnd(this.enable) || !this.enable.subscribe) {
-			this.enable = ko.observable(isUnd(this.enable) ? true : !!this.enable);
+		if (undefined === this.enable || !this.enable.subscribe) {
+			this.enable = ko.observable(undefined === this.enable ? true : !!this.enable);
 		}

 		this.disable = params.disable;
-		if (isUnd(this.disable) || !this.disable.subscribe) {
-			this.disable = ko.observable(isUnd(this.disable) ? false : !!this.disable);
+		if (undefined === this.disable || !this.disable.subscribe) {
+			this.disable = ko.observable(undefined === this.disable ? false : !!this.disable);
 		}

 		this.label = params.label || '';
-		this.inline = isUnd(params.inline) ? false : params.inline;
+		this.inline = undefined === params.inline ? false : params.inline;

-		this.readOnly = isUnd(params.readOnly) ? false : !!params.readOnly;
-		this.inverted = isUnd(params.inverted) ? false : !!params.inverted;
+		this.readOnly = undefined === params.readOnly ? false : !!params.readOnly;
+		this.inverted = undefined === params.inverted ? false : !!params.inverted;

-		this.labeled = !isUnd(params.label);
+		this.labeled = undefined !== params.label;
 		this.labelAnimated = !!params.labelAnimated;
 	}

--- a/dev/Component/AbstractInput.js
+++ b/dev/Component/AbstractInput.js
@ -1,5 +1,5 @@
 import ko from 'ko';
-import { isUnd, trim, pInt } from 'Common/Utils';
+import { trim, pInt } from 'Common/Utils';
 import { SaveSettingsStep } from 'Common/Enums';
 import { AbstractComponent } from 'Component/Abstract';

@ -14,13 +14,13 @@ class AbstractInput extends AbstractComponent {
 		this.size = params.size || 0;
 		this.label = params.label || '';
 		this.preLabel = params.preLabel || '';
-		this.enable = isUnd(params.enable) ? true : params.enable;
+		this.enable = undefined === params.enable ? true : params.enable;
 		this.trigger = params.trigger && params.trigger.subscribe ? params.trigger : null;
 		this.placeholder = params.placeholder || '';

-		this.labeled = !isUnd(params.label);
-		this.preLabeled = !isUnd(params.preLabel);
-		this.triggered = !isUnd(params.trigger) && !!this.trigger;
+		this.labeled = undefined !== params.label;
+		this.preLabeled = undefined !== params.preLabel;
+		this.triggered = undefined !== params.trigger && !!this.trigger;

 		this.classForTrigger = ko.observable('');

@ -30,7 +30,7 @@ class AbstractInput extends AbstractComponent {
 			return (0 < size ? 'span' + size : '') + suffixValue;
 		});

-		if (!isUnd(params.width) && params.element) {
+		if (undefined !== params.width && params.element) {
 			params.element.find('input,select,textarea').css('width', params.width);
 		}

--- a/dev/Component/AbstractRadio.js
+++ b/dev/Component/AbstractRadio.js
@ -1,5 +1,4 @@
 import ko from 'ko';
-import { isUnd } from 'Common/Utils';
 import { AbstractComponent } from 'Component/Abstract';

 class AbstractRadio extends AbstractComponent {
@ -12,12 +11,12 @@ class AbstractRadio extends AbstractComponent {
 		this.values = ko.observableArray([]);

 		this.value = params.value;
-		if (isUnd(this.value) || !this.value.subscribe) {
+		if (undefined === this.value || !this.value.subscribe) {
 			this.value = ko.observable('');
 		}

-		this.inline = isUnd(params.inline) ? false : params.inline;
-		this.readOnly = isUnd(params.readOnly) ? false : !!params.readOnly;
+		this.inline = undefined === params.inline ? false : params.inline;
+		this.readOnly = undefined === params.readOnly ? false : !!params.readOnly;

 		if (params.values) {
 			this.values(Object.entries(params.values).map((label, value) => ({ label: label, value: value })));
--- a/dev/Component/TextArea.js
+++ b/dev/Component/TextArea.js
@ -1,4 +1,3 @@
-import { isUnd } from 'Common/Utils';
 import { componentExportHelper } from 'Component/Abstract';
 import { AbstractInput } from 'Component/AbstractInput';

@ -12,7 +11,7 @@ class TextAreaComponent extends AbstractInput {
 		super(params);

 		this.rows = params.rows || DEFAULT_ROWS;
-		this.spellcheck = isUnd(params.spellcheck) ? false : !!params.spellcheck;
+		this.spellcheck = undefined === params.spellcheck ? false : !!params.spellcheck;
 	}
 }

--- a/dev/External/ko.js
+++ b/dev/External/ko.js
@ -1,5 +1,4 @@
 import window from 'window';
-import _ from '_';
 import $ from '$';
 import Opentip from 'Opentip';
 import Pikaday from 'pikaday';
@ -81,14 +80,21 @@ ko.bindingHandlers.json = {

 ko.bindingHandlers.scrollerShadows = {
 	init: (element) => {
+		var t;
 		const limit = 8,
 			$el = $(element),
 			cont = $el.find('[data-scroller-shadows-content]')[0] || null,
-			fFunc = _.throttle(() => {
-				$el
-					.toggleClass('scroller-shadow-top', limit < cont.scrollTop)
-					.toggleClass('scroller-shadow-bottom', cont.scrollTop + limit < cont.scrollHeight - cont.clientHeight);
-			}, 100);
+			// throttle
+			fFunc = ()=>{
+				if (!t) {
+					t = setTimeout(()=>{
+						$el
+							.toggleClass('scroller-shadow-top', limit < cont.scrollTop)
+							.toggleClass('scroller-shadow-bottom', cont.scrollTop + limit < cont.scrollHeight - cont.clientHeight);
+						t = 0;
+					}, 100);
+				}
+			};

 		if (cont) {
 			$(cont).on('scroll resize', fFunc);
--- a/dev/Helper/Message.js
+++ b/dev/Helper/Message.js
@ -1,4 +1,4 @@
-import { isNonEmptyArray, isUnd } from 'Common/Utils';
+import { isNonEmptyArray } from 'Common/Utils';
 import { EmailModel } from 'Model/Email';

 /**
@ -59,7 +59,7 @@ export function emailArrayFromJson(json) {
 export function replyHelper(inputEmails, unic, localEmails) {
 	if (inputEmails) {
 		inputEmails.forEach(email => {
-			if (isUnd(unic[email.email])) {
+			if (undefined === unic[email.email]) {
 				unic[email.email] = true;
 				localEmails.push(email);
 			}
--- a/dev/Knoin/AbstractModel.js
+++ b/dev/Knoin/AbstractModel.js
@ -1,4 +1,9 @@
-import { isArray, disposeObject } from 'Common/Utils';
+
+function disposeOne(disposable) {
+	if (disposable && 'function' === typeof disposable.dispose) {
+		disposable.dispose();
+	}
+}

 export class AbstractModel {
 	sModelName = '';
@ -12,7 +17,7 @@ export class AbstractModel {
 	}

 	regDisposables(value) {
-		if (isArray(value)) {
+		if (Array.isArray(value)) {
 			value.forEach((item) => {
 				this.disposables.push(item);
 			});
@ -22,6 +27,9 @@ export class AbstractModel {
 	}

 	onDestroy() {
-		disposeObject(this);
+		if (Array.isArray(this.disposables)) {
+			this.disposables.forEach(disposeOne);
+		}
+		Object.values(this).forEach(disposeOne);
 	}
 }
--- a/dev/Knoin/AbstractScreen.js
+++ b/dev/Knoin/AbstractScreen.js
@ -1,5 +1,5 @@
 import crossroads from 'crossroads';
-import { isArray, isNonEmptyArray, noop } from 'Common/Utils';
+import { isNonEmptyArray } from 'Common/Utils';

 export class AbstractScreen {
 	oCross = null;
@ -8,7 +8,7 @@ export class AbstractScreen {

 	constructor(screenName, viewModels = []) {
 		this.sScreenName = screenName;
-		this.aViewModels = isArray(viewModels) ? viewModels : [];
+		this.aViewModels = Array.isArray(viewModels) ? viewModels : [];
 	}

 	/**
@ -48,7 +48,7 @@ export class AbstractScreen {
 		const routes = this.routes();

 		if (isNonEmptyArray(routes)) {
-			fMatcher = (this.onRoute || noop).bind(this);
+			fMatcher = (this.onRoute || (()=>{})).bind(this);
 			route = crossroads.create();

 			routes.forEach((item) => {
--- a/dev/Knoin/Knoin.js
+++ b/dev/Knoin/Knoin.js
@ -1,4 +1,3 @@
-import _ from '_';
 import $ from '$';
 import ko from 'ko';
 import hasher from 'hasher';
@ -8,7 +7,7 @@ import { Magics } from 'Common/Enums';
 import { runHook } from 'Common/Plugins';
 import { $htmlCL, VIEW_MODELS, popupVisibilityNames } from 'Common/Globals';

-import { isArray, isUnd, pString, log, isFunc, createCommandLegacy, delegateRun, isNonEmptyArray } from 'Common/Utils';
+import { pString, log, createCommandLegacy, delegateRun, isNonEmptyArray } from 'Common/Utils';

 let currentScreen = null,
 	defaultScreenName = '';
@ -95,7 +94,7 @@ export function routeOn() {
 * @returns {?Object}
 */
 export function screen(screenName) {
-	return screenName && !isUnd(SCREENS[screenName]) ? SCREENS[screenName] : null;
+	return screenName && undefined !== SCREENS[screenName] ? SCREENS[screenName] : null;
 }

 /**
@ -317,7 +316,7 @@ export function screenOnRoute(screenName, subPart) {
 				delegateRun(vmScreen, 'onBuild');
 			}

-			_.defer(() => {
+			setTimeout(() => {
 				// hide screen
 				if (currentScreen && !isSameScreen) {
 					delegateRun(currentScreen, 'onHide');
@ -389,7 +388,7 @@ export function screenOnRoute(screenName, subPart) {
 				if (cross) {
 					cross.parse(subPart);
 				}
-			});
+			}, 1);
 		}
 	}
 }
@ -470,7 +469,7 @@ function viewDecorator({ name, type, templateID }) {
 	return (target) => {
 		if (target) {
 			if (name) {
-				if (isArray(name)) {
+				if (Array.isArray(name)) {
 					target.__names = name;
 				} else {
 					target.__names = [name];
@ -509,7 +508,7 @@ function commandDecorator(canExecute = true) {
 		}

 		const value = descriptor.value || descriptor.initializer(),
-			normCanExecute = isFunc(canExecute) ? canExecute : () => !!canExecute;
+			normCanExecute = typeof canExecute === 'function' ? canExecute : () => !!canExecute;

 		descriptor.value = function(...args) {
 			if (normCanExecute.call(this, this)) {
@ -531,23 +530,30 @@ function commandDecorator(canExecute = true) {
 * @returns {Function}
 */
 function settingsMenuKeysHandler($items) {
-	return _.throttle((event, handler) => {
-		const up = handler && 'up' === handler.shortcut;
+	// throttle
+	var t;
+	return (event, handler)=>{
+		if (!t) {
+			t = setTimeout(()=>{
+				const up = handler && 'up' === handler.shortcut;

-		if (event && $items.length) {
-			let index = $items.index($items.filter('.selected'));
-			if (up && 0 < index) {
-				index -= 1;
-			} else if (!up && index < $items.length - 1) {
-				index += 1;
-			}
+				if (event && $items.length) {
+					let index = $items.index($items.filter('.selected'));
+					if (up && 0 < index) {
+						index -= 1;
+					} else if (!up && index < $items.length - 1) {
+						index += 1;
+					}

-			const resultHash = $items.eq(index).attr('href');
-			if (resultHash) {
-				setHash(resultHash, false, true);
-			}
+					const resultHash = $items.eq(index).attr('href');
+					if (resultHash) {
+						setHash(resultHash, false, true);
+					}
+				}
+				t = 0;
+			}, Magics.Time200ms);
 		}
-	}, Magics.Time200ms);
+	};
 }

 export {
--- a/dev/Model/Attachment.js
+++ b/dev/Model/Attachment.js
@ -2,7 +2,7 @@ import window from 'window';
 import ko from 'ko';

 import { FileType } from 'Common/Enums';
-import { bAllowPdfPreview } from 'Common/Globals';
+import { bMobileDevice } from 'Common/Globals';
 import { trim, pInt, isNonEmptyArray, getFileExtension, friendlySize } from 'Common/Utils';
 import {
 	attachmentDownload,
@ -16,6 +16,8 @@ import { AbstractModel } from 'Knoin/AbstractModel';

 import Audio from 'Common/Audio';

+const bAllowPdfPreview = !bMobileDevice && undefined !== window.navigator.mimeTypes['application/pdf'];
+
 /**
 * @param {string} sExt
 * @param {string} sMimeType
--- a/dev/Model/ComposeAttachment.js
+++ b/dev/Model/ComposeAttachment.js
@ -1,5 +1,5 @@
 import ko from 'ko';
-import { isUnd, pInt, friendlySize, mimeContentType, getFileExtension } from 'Common/Utils';
+import { pInt, friendlySize, mimeContentType, getFileExtension } from 'Common/Utils';

 import { staticIconClass, staticFileType } from 'Model/Attachment';
 import { AbstractModel } from 'Knoin/AbstractModel';
@ -75,8 +75,8 @@ class ComposeAttachmentModel extends AbstractModel {
 		let bResult = false;
 		if (json) {
 			this.fileName(json.Name);
-			this.size(isUnd(json.Size) ? 0 : pInt(json.Size));
-			this.tempName(isUnd(json.TempName) ? '' : json.TempName);
+			this.size(undefined === json.Size ? 0 : pInt(json.Size));
+			this.tempName(undefined === json.TempName ? '' : json.TempName);
 			this.isInline = false;

 			bResult = true;
--- a/dev/Model/Message.js
+++ b/dev/Model/Message.js
@ -10,8 +10,6 @@ import { DATA_IMAGE_LAZY_PLACEHOLDER_PIC } from 'Common/Consts';

 import {
 	pInt,
-	isArray,
-	isUnd,
 	trim,
 	previewMessage,
 	windowResize,
@ -267,7 +265,7 @@ class MessageModel extends AbstractModel {
 			this.unsubsribeLinks = isNonEmptyArray(json.UnsubsribeLinks) ? json.UnsubsribeLinks : [];

 			this.subject(json.Subject);
-			if (isArray(json.SubjectParts)) {
+			if (Array.isArray(json.SubjectParts)) {
 				this.subjectPrefix(json.SubjectParts[0]);
 				this.subjectSuffix(json.SubjectParts[1]);
 			} else {
@ -277,14 +275,14 @@ class MessageModel extends AbstractModel {

 			this.dateTimeStampInUTC(pInt(json.DateTimeStampInUTC));
 			this.hasAttachments(!!json.HasAttachments);
-			this.attachmentsSpecData(isArray(json.AttachmentsSpecData) ? json.AttachmentsSpecData : []);
+			this.attachmentsSpecData(Array.isArray(json.AttachmentsSpecData) ? json.AttachmentsSpecData : []);

 			this.fromEmailString(emailArrayToString(this.from, true));
 			this.fromClearEmailString(emailArrayToStringClear(this.from));
 			this.toEmailsString(emailArrayToString(this.to, true));
 			this.toClearEmailsString(emailArrayToStringClear(this.to));

-			this.threads(isArray(json.Threads) ? json.Threads : []);
+			this.threads(Array.isArray(json.Threads) ? json.Threads : []);

 			this.initFlagsByJson(json);
 			this.computeSenderEmail();
@ -323,9 +321,9 @@ class MessageModel extends AbstractModel {
 			}

 			this.hasAttachments(!!json.HasAttachments);
-			this.attachmentsSpecData(isArray(json.AttachmentsSpecData) ? json.AttachmentsSpecData : []);
+			this.attachmentsSpecData(Array.isArray(json.AttachmentsSpecData) ? json.AttachmentsSpecData : []);

-			this.foundedCIDs = isArray(json.FoundedCIDs) ? json.FoundedCIDs : [];
+			this.foundedCIDs = Array.isArray(json.FoundedCIDs) ? json.FoundedCIDs : [];
 			this.attachments(this.initAttachmentsFromJson(json.Attachments));

 			this.readReceipt(json.ReadReceipt || '');
@ -545,7 +543,7 @@ class MessageModel extends AbstractModel {
 	 * @returns {string}
 	 */
 	fromAsSingleEmail() {
-		return isArray(this.from) && this.from[0] ? this.from[0].email : '';
+		return Array.isArray(this.from) && this.from[0] ? this.from[0].email : '';
 	}

 	/**
@ -569,7 +567,7 @@ class MessageModel extends AbstractModel {
 	 */
 	replyEmails(excludeEmails, last = false) {
 		const result = [],
-			unic = isUnd(excludeEmails) ? {} : excludeEmails;
+			unic = undefined === excludeEmails ? {} : excludeEmails;

 		replyHelper(this.replyTo, unic, result);
 		if (!result.length) {
@ -592,7 +590,7 @@ class MessageModel extends AbstractModel {
 		let data = [];
 		const toResult = [],
 			ccResult = [],
-			unic = isUnd(excludeEmails) ? {} : excludeEmails;
+			unic = undefined === excludeEmails ? {} : excludeEmails;

 		replyHelper(this.replyTo, unic, toResult);
 		if (!toResult.length) {
--- a/dev/Promises/AbstractAjax.js
+++ b/dev/Promises/AbstractAjax.js
@ -1,7 +1,7 @@
 import window from 'window';

 import { ajax } from 'Common/Links';
-import { isUnd, isNormal, pString } from 'Common/Utils';
+import { isNormal, pString } from 'Common/Utils';
 import { DEFAULT_AJAX_TIMEOUT, TOKEN_ERROR_LIMIT, AJAX_ERROR_LIMIT } from 'Common/Consts';
 import { Notification } from 'Common/Enums';
 import { data as GlobalsData } from 'Common/Globals';
@ -39,7 +39,7 @@ class AbstractAjaxPromises extends AbstractBasicPromises {

 	ajaxRequest(action, isPost, timeOut, params, additionalGetString, fTrigger) {

-		additionalGetString = isUnd(additionalGetString) ? '' : pString(additionalGetString);
+		additionalGetString = undefined === additionalGetString ? '' : pString(additionalGetString);

 		let init = {
 			mode: 'same-origin',
@ -155,7 +155,6 @@ class AbstractAjaxPromises extends AbstractBasicPromises {

 				return data;
 			}).catch(err => {
-window.console.log('AbstractAjaxPromises ' + action + ' request failed:', err, Notification.getKeyByValue(err));
 				if (err.name == 'AbortError') { // handle abort()
 					return Promise.reject(Notification.AjaxAbort);
 				}
@ -164,7 +163,7 @@ window.console.log('AbstractAjaxPromises ' + action + ' request failed:', err, N
 	}

 	getRequest(sAction, fTrigger, sAdditionalGetString, iTimeOut) {
-		sAdditionalGetString = isUnd(sAdditionalGetString) ? '' : pString(sAdditionalGetString);
+		sAdditionalGetString = undefined === sAdditionalGetString ? '' : pString(sAdditionalGetString);
 		sAdditionalGetString = sAction + '/' + sAdditionalGetString;

 		return this.ajaxRequest(sAction, false, iTimeOut, null, sAdditionalGetString, fTrigger);
--- a/dev/Promises/AbstractBasic.js
+++ b/dev/Promises/AbstractBasic.js
@ -1,5 +1,4 @@
 import window from 'window';
-import { isArray } from 'Common/Utils';

 export class AbstractBasicPromises {
 	oPromisesStack = {};
@ -20,7 +19,7 @@ export class AbstractBasicPromises {
 	setTrigger(trigger, value) {
 		if (trigger) {
 			value = !!value;
-			(isArray(trigger) ? trigger : [trigger]).forEach((fTrigger) => {
+			(Array.isArray(trigger) ? trigger : [trigger]).forEach((fTrigger) => {
 				if (fTrigger) {
 					fTrigger(value);
 				}
--- a/dev/Promises/User/Populator.js
+++ b/dev/Promises/User/Populator.js
@ -1,5 +1,5 @@
 import { UNUSED_OPTION_VALUE } from 'Common/Consts';
-import { isArray, isNormal, pInt, isUnd, noop } from 'Common/Utils';
+import { isNormal, pInt } from 'Common/Utils';
 import { ClientSideKeyName, ServerFolderType } from 'Common/Enums';
 import * as Cache from 'Common/Cache';

@ -21,7 +21,7 @@ class PromisesUserPopulator extends AbstractBasicPromises {
 	 * @returns {boolean}
 	 */
 	isFolderExpanded(sFullNameHash, expandedFolders) {
-		return expandedFolders && isArray(expandedFolders) && expandedFolders.includes(sFullNameHash);
+		return expandedFolders && Array.isArray(expandedFolders) && expandedFolders.includes(sFullNameHash);
 	}

 	/**
@ -84,7 +84,7 @@ class PromisesUserPopulator extends AbstractBasicPromises {
 						oFolder.SubFolders &&
 						'Collection/FolderCollection' === oFolder.SubFolders['@Object'] &&
 						oFolder.SubFolders['@Collection'] &&
-						isArray(oFolder.SubFolders['@Collection'])
+						Array.isArray(oFolder.SubFolders['@Collection'])
 					) {
 						oCacheFolder.subFolders(
 							this.folderResponseParseRec(sNamespace, oFolder.SubFolders['@Collection'], expandedFolders)
@ -104,7 +104,7 @@ class PromisesUserPopulator extends AbstractBasicPromises {
 			oData &&
 			'Collection/FolderCollection' === oData['@Object'] &&
 			oData['@Collection'] &&
-			isArray(oData['@Collection'])
+			Array.isArray(oData['@Collection'])
 		) {
 			const expandedFolders = Local.get(ClientSideKeyName.ExpandedFolders),
 				cnt = pInt(oData.CountRec);
@ -116,7 +116,7 @@ class PromisesUserPopulator extends AbstractBasicPromises {

 			FolderStore.folderList(
 				this.folderResponseParseRec(
-					isUnd(oData.Namespace) ? '' : oData.Namespace,
+					undefined === oData.Namespace ? '' : oData.Namespace,
 					oData['@Collection'],
 					expandedFolders
 				)
@ -130,9 +130,9 @@ class PromisesUserPopulator extends AbstractBasicPromises {
 			oData &&
 			'Collection/FolderCollection' === oData['@Object'] &&
 			oData['@Collection'] &&
-			isArray(oData['@Collection'])
+			Array.isArray(oData['@Collection'])
 		) {
-			if (!isUnd(oData.Namespace)) {
+			if (undefined !== oData.Namespace) {
 				FolderStore.namespace = oData.Namespace;
 			}

@ -168,7 +168,7 @@ class PromisesUserPopulator extends AbstractBasicPromises {
 			FolderStore.archiveFolder(this.normalizeFolder(Settings.settingsGet('ArchiveFolder')));

 			if (update) {
-				Remote.saveSystemFolders(noop, {
+				Remote.saveSystemFolders(()=>{}, {
 					SentFolder: FolderStore.sentFolder(),
 					DraftFolder: FolderStore.draftFolder(),
 					SpamFolder: FolderStore.spamFolder(),
--- a/dev/Remote/AbstractAjax.js
+++ b/dev/Remote/AbstractAjax.js
@ -2,7 +2,7 @@ import window from 'window';

 import { TOKEN_ERROR_LIMIT, AJAX_ERROR_LIMIT, DEFAULT_AJAX_TIMEOUT } from 'Common/Consts';
 import { StorageResultType, Notification } from 'Common/Enums';
-import { pInt, pString, isUnd } from 'Common/Utils';
+import { pInt, pString } from 'Common/Utils';
 import { data as GlobalsData } from 'Common/Globals';
 import { ajax } from 'Common/Links';
 import { runHook } from 'Common/Plugins';
@ -132,7 +132,7 @@ class AbstractAjaxRemote {
 	ajaxRequest(fResultCallback, params, iTimeOut = 20000, sGetAdd = '', abortActions = []) {
 		params = params || {};
 		const isPost = !sGetAdd,
-			start = new window.Date().getTime(),
+			start = new Date().getTime(),
 			action = params.Action || '';

 		if (action && abortActions) {
@ -222,7 +222,7 @@ class AbstractAjaxRemote {
 		return this.ajaxRequest(
 			fCallback,
 			oParameters,
-			isUnd(iTimeout) ? DEFAULT_AJAX_TIMEOUT : pInt(iTimeout),
+			undefined === iTimeout ? DEFAULT_AJAX_TIMEOUT : pInt(iTimeout),
 			sGetAdd,
 			aAbortActions
 		);
--- a/dev/Remote/User/Ajax.js
+++ b/dev/Remote/User/Ajax.js
@ -1,4 +1,4 @@
-import { pString, pInt, isArray, trim, boolToAjax } from 'Common/Utils';
+import { pString, pInt, trim } from 'Common/Utils';

 import {
 	CONTACTS_SYNC_AJAX_TIMEOUT,
@ -244,7 +244,7 @@ class RemoteUserAjax extends AbstractAjaxRemote {
 	filtersSave(fCallback, filters, raw, isRawIsActive) {
 		this.defaultRequest(fCallback, 'FiltersSave', {
 			'Raw': raw,
-			'RawIsActive': boolToAjax(isRawIsActive),
+			'RawIsActive': isRawIsActive ? '1' : '0',
 			'Filters': filters.map(item => item.toJson())
 		});
 	}
@ -449,7 +449,7 @@ class RemoteUserAjax extends AbstractAjaxRemote {
 		let request = true;
 		const uids = [];

-		if (isArray(list) && list.length) {
+		if (Array.isArray(list) && list.length) {
 			request = false;
 			list.forEach(messageListItem => {
 				if (!getMessageFlagsFromCache(messageListItem.folderFullNameRaw, messageListItem.uid)) {
@ -473,7 +473,7 @@ class RemoteUserAjax extends AbstractAjaxRemote {
 		if (request) {
 			this.defaultRequest(fCallback, 'FolderInformation', {
 				'Folder': folder,
-				'FlagsUids': isArray(uids) ? uids.join(',') : '',
+				'FlagsUids': Array.isArray(uids) ? uids.join(',') : '',
 				'UidNext': getFolderInboxName() === folder ? getFolderUidNext(folder) : ''
 			});
 		} else if (SettingsStore.useThreads()) {
--- a/dev/Screen/AbstractSettings.js
+++ b/dev/Screen/AbstractSettings.js
@ -1,9 +1,8 @@
-import _ from '_';
 import $ from '$';
 import ko from 'ko';

 import { VIEW_MODELS } from 'Common/Globals';
-import { delegateRun, windowResize, log, isUnd, pString } from 'Common/Utils';
+import { delegateRun, windowResize, log, pString } from 'Common/Utils';
 import { settings } from 'Common/Links';

 import { setHash } from 'Knoin/Knoin';
@ -103,24 +102,25 @@ class AbstractSettingsScreen extends AbstractScreen {
 			}

 			if (settingsScreen) {
-				_.defer(() => {
+				const o = this;
+				setTimeout(() => {
 					// hide
-					if (this.oCurrentSubScreen) {
-						delegateRun(this.oCurrentSubScreen, 'onHide');
-						this.oCurrentSubScreen.viewModelDom.hide();
+					if (o.oCurrentSubScreen) {
+						delegateRun(o.oCurrentSubScreen, 'onHide');
+						o.oCurrentSubScreen.viewModelDom.hide();
 					}
 					// --

-					this.oCurrentSubScreen = settingsScreen;
+					o.oCurrentSubScreen = settingsScreen;

 					// show
-					if (this.oCurrentSubScreen) {
-						delegateRun(this.oCurrentSubScreen, 'onBeforeShow');
-						this.oCurrentSubScreen.viewModelDom.show();
-						delegateRun(this.oCurrentSubScreen, 'onShow');
-						delegateRun(this.oCurrentSubScreen, 'onShowWithDelay', [], 200);
+					if (o.oCurrentSubScreen) {
+						delegateRun(o.oCurrentSubScreen, 'onBeforeShow');
+						o.oCurrentSubScreen.viewModelDom.show();
+						delegateRun(o.oCurrentSubScreen, 'onShow');
+						delegateRun(o.oCurrentSubScreen, 'onShowWithDelay', [], 200);

-						this.menu().forEach(item => {
+						o.menu().forEach(item => {
 							item.selected(
 								settingsScreen &&
 									settingsScreen.__rlSettingsData &&
@ -133,7 +133,7 @@ class AbstractSettingsScreen extends AbstractScreen {
 					// --

 					windowResize();
-				});
+				}, 1);
 			}
 		} else {
 			setHash(settings(), false, true);
@ -180,7 +180,7 @@ class AbstractSettingsScreen extends AbstractScreen {
 			rules = {
 				subname: /^(.*)$/,
 				normalize_: (rquest, vals) => {
-					vals.subname = isUnd(vals.subname) ? defaultRoute : pString(vals.subname);
+					vals.subname = undefined === vals.subname ? defaultRoute : pString(vals.subname);
 					return [vals.subname];
 				}
 			};
--- a/dev/Screen/User/MailBox.js
+++ b/dev/Screen/User/MailBox.js
@ -1,8 +1,8 @@
-import _ from '_';
+import window from 'window';

 import { Focused, Capa, ClientSideKeyName, Magics } from 'Common/Enums';
 import { $html, leftPanelDisabled, leftPanelType, moveAction, bMobileDevice } from 'Common/Globals';
-import { pString, pInt, decodeURI, windowResizeCallback } from 'Common/Utils';
+import { pString, pInt, windowResizeCallback } from 'Common/Utils';
 import { getFolderFromCacheList, getFolderFullNameRaw, getFolderInboxName } from 'Common/Cache';
 import { i18n } from 'Common/Translator';

@ -131,9 +131,9 @@ class MailBoxUserScreen extends AbstractScreen {
 	 */
 	onBuild() {
 		if (!bMobileDevice && !Settings.appSettingsGet('mobile')) {
-			_.defer(() => {
-				getApp().initHorizontalLayoutResizer(ClientSideKeyName.MessageListSize);
-			});
+			setTimeout(() =>
+				getApp().initHorizontalLayoutResizer(ClientSideKeyName.MessageListSize)
+			, 1);
 		}

 		$html.on('click', '#rl-right', () => {
@ -157,7 +157,7 @@ class MailBoxUserScreen extends AbstractScreen {
 					vals[1] = 1;
 				}

-				return [decodeURI(vals[0]), vals[1], decodeURI(vals[2])];
+				return [window.decodeURI(vals[0]), vals[1], window.decodeURI(vals[2])];
 			},
 			fNormD = (request, vals) => {
 				vals[0] = pString(vals[0]);
@ -167,7 +167,7 @@ class MailBoxUserScreen extends AbstractScreen {
 					vals[0] = inboxFolderName;
 				}

-				return [decodeURI(vals[0]), 1, decodeURI(vals[1])];
+				return [window.decodeURI(vals[0]), 1, window.decodeURI(vals[1])];
 			};

 		return [
--- a/dev/Settings/Admin/Contacts.js
+++ b/dev/Settings/Admin/Contacts.js
@ -1,6 +1,6 @@
 import ko from 'ko';

-import { settingsSaveHelperSimpleFunction, defautOptionsAfterRender, trim, boolToAjax } from 'Common/Utils';
+import { settingsSaveHelperSimpleFunction, defautOptionsAfterRender, trim } from 'Common/Utils';

 import { SaveSettingsStep, StorageResultType, Magics } from 'Common/Enums';
 import { i18n } from 'Common/Translator';
@ -151,13 +151,13 @@ class ContactsAdminSettings {

 			this.enableContacts.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'ContactsEnable': boolToAjax(value)
+					'ContactsEnable': value ? '1' : '0'
 				});
 			});

 			this.contactsSync.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'ContactsSync': boolToAjax(value)
+					'ContactsSync': value ? '1' : '0'
 				});
 			});

--- a/dev/Settings/Admin/General.js
+++ b/dev/Settings/Admin/General.js
@ -3,7 +3,6 @@ import ko from 'ko';
 import {
 	trim,
 	pInt,
-	boolToAjax,
 	settingsSaveHelperSimpleFunction,
 	changeTheme,
 	convertThemeName,
@ -116,49 +115,49 @@ class GeneralAdminSettings {

 			this.capaAdditionalAccounts.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'CapaAdditionalAccounts': boolToAjax(value)
+					'CapaAdditionalAccounts': value ? '1' : '0'
 				});
 			});

 			this.capaIdentities.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'CapaIdentities': boolToAjax(value)
+					'CapaIdentities': value ? '1' : '0'
 				});
 			});

 			this.capaTemplates.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'CapaTemplates': boolToAjax(value)
+					'CapaTemplates': value ? '1' : '0'
 				});
 			});

 			this.capaAttachmentThumbnails.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'CapaAttachmentThumbnails': boolToAjax(value)
+					'CapaAttachmentThumbnails': value ? '1' : '0'
 				});
 			});

 			this.capaThemes.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'CapaThemes': boolToAjax(value)
+					'CapaThemes': value ? '1' : '0'
 				});
 			});

 			this.capaUserBackground.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'CapaUserBackground': boolToAjax(value)
+					'CapaUserBackground': value ? '1' : '0'
 				});
 			});

 			this.allowLanguagesOnSettings.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'AllowLanguagesOnSettings': boolToAjax(value)
+					'AllowLanguagesOnSettings': value ? '1' : '0'
 				});
 			});

 			this.newMoveToFolder.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'NewMoveToFolder': boolToAjax(value)
+					'NewMoveToFolder': value ? '1' : '0'
 				});
 			});
 		}, Magics.Time50ms);
--- a/dev/Settings/Admin/Login.js
+++ b/dev/Settings/Admin/Login.js
@ -1,6 +1,6 @@
 import ko from 'ko';

-import { settingsSaveHelperSimpleFunction, boolToAjax, trim } from 'Common/Utils';
+import { settingsSaveHelperSimpleFunction, trim } from 'Common/Utils';
 import { settingsGet } from 'Storage/Settings';

 import AppStore from 'Stores/Admin/App';
@ -24,19 +24,19 @@ class LoginAdminSettings {

 			this.determineUserLanguage.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'DetermineUserLanguage': boolToAjax(value)
+					'DetermineUserLanguage': value ? '1' : '0'
 				});
 			});

 			this.determineUserDomain.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'DetermineUserDomain': boolToAjax(value)
+					'DetermineUserDomain': value ? '1' : '0'
 				});
 			});

 			this.allowLanguagesOnLogin.subscribe((value) => {
 				Remote.saveAdminConfig(null, {
-					'AllowLanguagesOnLogin': boolToAjax(value)
+					'AllowLanguagesOnLogin': value ? '1' : '0'
 				});
 			});

--- a/dev/Settings/Admin/Plugins.js
+++ b/dev/Settings/Admin/Plugins.js
@ -2,7 +2,6 @@ import ko from 'ko';

 import { StorageResultType, Notification } from 'Common/Enums';
 import { getNotification } from 'Common/Translator';
-import { boolToAjax } from 'Common/Utils';

 import { settingsGet } from 'Storage/Settings';
 import { showScreenPopup } from 'Knoin/Knoin';
@ -59,7 +58,7 @@ class PluginsAdminSettings {

 		this.enabledPlugins.subscribe((value) => {
 			Remote.saveAdminConfig(null, {
-				'EnabledPlugins': boolToAjax(value)
+				'EnabledPlugins': value ? '1' : '0'
 			});
 		});
 	}
--- a/dev/Settings/Admin/Security.js
+++ b/dev/Settings/Admin/Security.js
@ -1,6 +1,6 @@
 import ko from 'ko';

-import { trim, boolToAjax } from 'Common/Utils';
+import { trim } from 'Common/Utils';
 import { StorageResultType, Magics } from 'Common/Enums';

 import { settingsGet } from 'Storage/Settings';
@ -126,37 +126,37 @@ class SecurityAdminSettings {
 	onBuild() {
 		this.capaOpenPGP.subscribe((value) => {
 			Remote.saveAdminConfig(null, {
-				'CapaOpenPGP': boolToAjax(value)
+				'CapaOpenPGP': value ? '1' : '0'
 			});
 		});

 		this.capaTwoFactorAuth.subscribe((value) => {
 			Remote.saveAdminConfig(null, {
-				'CapaTwoFactorAuth': boolToAjax(value)
+				'CapaTwoFactorAuth': value ? '1' : '0'
 			});
 		});

 		this.capaTwoFactorAuthForce.subscribe((value) => {
 			Remote.saveAdminConfig(null, {
-				'CapaTwoFactorAuthForce': boolToAjax(value)
+				'CapaTwoFactorAuthForce': value ? '1' : '0'
 			});
 		});

 		this.useLocalProxyForExternalImages.subscribe((value) => {
 			Remote.saveAdminConfig(null, {
-				'UseLocalProxyForExternalImages': boolToAjax(value)
+				'UseLocalProxyForExternalImages': value ? '1' : '0'
 			});
 		});

 		this.verifySslCertificate.subscribe((value) => {
 			Remote.saveAdminConfig(null, {
-				'VerifySslCertificate': boolToAjax(value)
+				'VerifySslCertificate': value ? '1' : '0'
 			});
 		});

 		this.allowSelfSigned.subscribe((value) => {
 			Remote.saveAdminConfig(null, {
-				'AllowSelfSigned': boolToAjax(value)
+				'AllowSelfSigned': value ? '1' : '0'
 			});
 		});
 	}
--- a/dev/Settings/User/Accounts.js
+++ b/dev/Settings/User/Accounts.js
@ -1,5 +1,4 @@
 import window from 'window';
-import _ from '_';
 import ko from 'ko';

 import { Capa, StorageResultType } from 'Common/Enums';
@ -69,7 +68,7 @@ class AccountsUserSettings {
 						setHash(root(), true);
 						routeOff();

-						_.defer(() => window.location.reload());
+						setTimeout(() => window.location.reload(), 1);
 					} else {
 						getApp().accountsAndIdentities();
 					}
--- a/dev/Settings/User/Contacts.js
+++ b/dev/Settings/User/Contacts.js
@ -1,7 +1,6 @@
 import ko from 'ko';

 import { Magics } from 'Common/Enums';
-import { boolToAjax } from 'Common/Utils';

 import AppStore from 'Stores/User/App';
 import ContactStore from 'Stores/User/Contact';
@ -32,7 +31,7 @@ class ContactsUserSettings {
 	onBuild() {
 		this.contactsAutosave.subscribe((value) => {
 			Remote.saveSettings(null, {
-				'ContactsAutosave': boolToAjax(value)
+				'ContactsAutosave': value ? '1' : '0'
 			});
 		});

--- a/dev/Settings/User/Filters.js
+++ b/dev/Settings/User/Filters.js
@ -1,6 +1,6 @@
 import ko from 'ko';

-import { windowResizeCallback, isArray, trim, delegateRunOnDestroy } from 'Common/Utils';
+import { windowResizeCallback, trim, delegateRunOnDestroy } from 'Common/Utils';
 import { StorageResultType, Notification } from 'Common/Enums';
 import { getNotification } from 'Common/Translator';

@ -107,7 +107,7 @@ class FiltersUserSettings {
 				this.filters.loading(false);
 				this.serverError(false);

-				if (StorageResultType.Success === result && data && data.Result && isArray(data.Result.Filters)) {
+				if (StorageResultType.Success === result && data && data.Result && Array.isArray(data.Result.Filters)) {
 					this.inited(true);
 					this.serverError(false);

@ -121,7 +121,7 @@ class FiltersUserSettings {
 					this.modules(data.Result.Modules ? data.Result.Modules : {});

 					this.filterRaw(data.Result.Raw || '');
-					this.filterRaw.capa(isArray(data.Result.Capa) ? data.Result.Capa.join(' ') : '');
+					this.filterRaw.capa(Array.isArray(data.Result.Capa) ? data.Result.Capa.join(' ') : '');
 					this.filterRaw.active(!!data.Result.RawIsActive);
 					this.filterRaw.allow(!!data.Result.RawIsAllow);
 				} else {
--- a/dev/Settings/User/Folders.js
+++ b/dev/Settings/User/Folders.js
@ -1,7 +1,7 @@
 import ko from 'ko';

 import { ClientSideKeyName, Notification, Magics } from 'Common/Enums';
-import { trim, noop } from 'Common/Utils';
+import { trim } from 'Common/Utils';
 import { getNotification, i18n } from 'Common/Translator';

 import { removeFolderFromCacheList } from 'Common/Cache';
@ -130,23 +130,23 @@ class FoldersUserSettings {

 	subscribeFolder(folder) {
 		Local.set(ClientSideKeyName.FoldersLashHash, '');
-		Remote.folderSetSubscribe(noop, folder.fullNameRaw, true);
+		Remote.folderSetSubscribe(()=>{}, folder.fullNameRaw, true);
 		folder.subScribed(true);
 	}

 	unSubscribeFolder(folder) {
 		Local.set(ClientSideKeyName.FoldersLashHash, '');
-		Remote.folderSetSubscribe(noop, folder.fullNameRaw, false);
+		Remote.folderSetSubscribe(()=>{}, folder.fullNameRaw, false);
 		folder.subScribed(false);
 	}

 	checkableTrueFolder(folder) {
-		Remote.folderSetCheckable(noop, folder.fullNameRaw, true);
+		Remote.folderSetCheckable(()=>{}, folder.fullNameRaw, true);
 		folder.checkable(true);
 	}

 	checkableFalseFolder(folder) {
-		Remote.folderSetCheckable(noop, folder.fullNameRaw, false);
+		Remote.folderSetCheckable(()=>{}, folder.fullNameRaw, false);
 		folder.checkable(false);
 	}
 }
--- a/dev/Settings/User/General.js
+++ b/dev/Settings/User/General.js
@ -4,7 +4,7 @@ import { MESSAGES_PER_PAGE_VALUES } from 'Common/Consts';

 import { SaveSettingsStep, Magics, EditorDefaultType, Layout } from 'Common/Enums';

-import { settingsSaveHelperSimpleFunction, convertLangName, isArray, timeOutAction, boolToAjax } from 'Common/Utils';
+import { settingsSaveHelperSimpleFunction, convertLangName, timeOutAction } from 'Common/Utils';

 import { i18n, trigger as translatorTrigger, reload as translatorReload } from 'Common/Translator';

@ -55,7 +55,7 @@ class GeneralUserSettings {

 		this.identityMain = ko.computed(() => {
 			const list = this.identities();
-			return isArray(list) ? list.find(item => item && !item.id()) : null;
+			return Array.isArray(list) ? list.find(item => item && !item.id()) : null;
 		});

 		this.identityMainDesc = ko.computed(() => {
@ -117,16 +117,16 @@ class GeneralUserSettings {

 			this.editorDefaultType.subscribe(Remote.saveSettingsHelper('EditorDefaultType', null, f0));
 			this.messagesPerPage.subscribe(Remote.saveSettingsHelper('MPP', null, f1));
-			this.showImages.subscribe(Remote.saveSettingsHelper('ShowImages', boolToAjax));
+			this.showImages.subscribe(Remote.saveSettingsHelper('ShowImages', v=>v?'1':'0'));

-			this.useCheckboxesInList.subscribe(Remote.saveSettingsHelper('UseCheckboxesInList', boolToAjax));
+			this.useCheckboxesInList.subscribe(Remote.saveSettingsHelper('UseCheckboxesInList', v=>v?'1':'0'));

 			this.enableDesktopNotification.subscribe((value) => {
 				timeOutAction(
 					'SaveDesktopNotifications',
 					() => {
 						Remote.saveSettings(null, {
-							'DesktopNotifications': boolToAjax(value)
+							'DesktopNotifications': value ? '1' : '0'
 						});
 					},
 					Magics.Time3s
@ -138,7 +138,7 @@ class GeneralUserSettings {
 					'SaveSoundNotification',
 					() => {
 						Remote.saveSettings(null, {
-							'SoundNotification': boolToAjax(value)
+							'SoundNotification': value ? '1' : '0'
 						});
 					},
 					Magics.Time3s
@ -150,7 +150,7 @@ class GeneralUserSettings {
 					'SaveReplySameFolder',
 					() => {
 						Remote.saveSettings(null, {
-							'ReplySameFolder': boolToAjax(value)
+							'ReplySameFolder': value ? '1' : '0'
 						});
 					},
 					Magics.Time3s
@ -160,7 +160,7 @@ class GeneralUserSettings {
 			this.useThreads.subscribe((value) => {
 				MessageStore.messageList([]);
 				Remote.saveSettings(null, {
-					'UseThreads': boolToAjax(value)
+					'UseThreads': value ? '1' : '0'
 				});
 			});

--- a/dev/Settings/User/OpenPgp.js
+++ b/dev/Settings/User/OpenPgp.js
@ -1,8 +1,7 @@
 import ko from 'ko';

-import { delegateRunOnDestroy, boolToAjax } from 'Common/Utils';
+import { delegateRunOnDestroy } from 'Common/Utils';
 import { Magics } from 'Common/Enums';
-import { bIsHttps } from 'Common/Globals';

 import PgpStore from 'Stores/User/Pgp';
 import SettingsStore from 'Stores/User/Settings';
@ -22,8 +21,6 @@ class OpenPgpUserSettings {
 		this.openPgpKeyForDeletion = ko.observable(null).deleteAccessHelper();

 		this.allowDraftAutosave = SettingsStore.allowDraftAutosave;
-
-		this.isHttps = bIsHttps;
 	}

 	addOpenPgpKey() {
@ -66,7 +63,7 @@ class OpenPgpUserSettings {

 	onBuild() {
 		setTimeout(() => {
-			this.allowDraftAutosave.subscribe(Remote.saveSettingsHelper('AllowDraftAutosave', boolToAjax));
+			this.allowDraftAutosave.subscribe(Remote.saveSettingsHelper('AllowDraftAutosave', v=>v?'1':'0'));
 		}, Magics.Time50ms);
 	}
 }
--- a/dev/Storage/RainLoop.js
+++ b/dev/Storage/RainLoop.js
@ -51,25 +51,25 @@ const __get = (key) => {
 const __set = (key, value) => {
 	if (SESS_STORAGE) {
 		SESS_STORAGE.setItem(key, value);
-	} else if (WIN_STORAGE && window.JSON) {
+	} else if (WIN_STORAGE) {
 		let data =
 			WIN_STORAGE.name && '{' === WIN_STORAGE.name.toString().substr(0, 1)
-				? window.JSON.parse(WIN_STORAGE.name.toString())
+				? JSON.parse(WIN_STORAGE.name.toString())
 				: null;
 		data = data || {};
 		data[key] = value;

-		WIN_STORAGE.name = window.JSON.stringify(data);
+		WIN_STORAGE.name = JSON.stringify(data);
 	}
 };

-const timestamp = () => window.Math.round(new window.Date().getTime() / 1000);
+const timestamp = () => Math.round(new Date().getTime() / 1000);

 const setTimestamp = () => __set(TIME_KEY, timestamp());

 const getTimestamp = () => {
 	const time = __get(TIME_KEY, 0);
-	return time ? window.parseInt(time, 10) || 0 : 0;
+	return time ? parseInt(time, 10) || 0 : 0;
 };

 /**
@ -111,4 +111,4 @@ export function checkTimestamp() {
 }

 // init section
-window.setInterval(setTimestamp, 1000 * 60); // 1m
+setInterval(setTimestamp, 1000 * 60); // 1m
--- a/dev/Storage/Settings.js
+++ b/dev/Storage/Settings.js
@ -1,5 +1,5 @@
 import window from 'window';
-import { isUnd, isNormal, isArray } from 'Common/Utils';
+import { isNormal } from 'Common/Utils';

 let SETTINGS = window.__rlah_data() || null;
 SETTINGS = isNormal(SETTINGS) ? SETTINGS : {};
@ -12,7 +12,7 @@ APP_SETTINGS = isNormal(APP_SETTINGS) ? APP_SETTINGS : {};
 * @returns {*}
 */
 export function settingsGet(name) {
-	return isUnd(SETTINGS[name]) ? null : SETTINGS[name];
+	return undefined === SETTINGS[name] ? null : SETTINGS[name];
 }

 /**
@ -28,7 +28,7 @@ export function settingsSet(name, value) {
 * @returns {*}
 */
 export function appSettingsGet(name) {
-	return isUnd(APP_SETTINGS[name]) ? null : APP_SETTINGS[name];
+	return undefined === APP_SETTINGS[name] ? null : APP_SETTINGS[name];
 }

 /**
@ -37,5 +37,5 @@ export function appSettingsGet(name) {
 */
 export function capa(name) {
 	const values = settingsGet('Capa');
-	return isArray(values) && isNormal(name) && values.includes(name);
+	return Array.isArray(values) && isNormal(name) && values.includes(name);
 }
--- a/dev/Stores/Language.js
+++ b/dev/Stores/Language.js
@ -1,5 +1,4 @@
 import ko from 'ko';
-import { isArray } from 'Common/Utils';
 import * as Settings from 'Storage/Settings';

 class LanguageStore {
@ -25,8 +24,8 @@ class LanguageStore {
 		const aLanguages = Settings.appSettingsGet('languages'),
 			aLanguagesAdmin = Settings.appSettingsGet('languagesAdmin');

-		this.languages(isArray(aLanguages) ? aLanguages : []);
-		this.languagesAdmin(isArray(aLanguagesAdmin) ? aLanguagesAdmin : []);
+		this.languages(Array.isArray(aLanguages) ? aLanguages : []);
+		this.languagesAdmin(Array.isArray(aLanguagesAdmin) ? aLanguagesAdmin : []);

 		this.language(Settings.settingsGet('Language'));
 		this.languageAdmin(Settings.settingsGet('LanguageAdmin'));
--- a/dev/Stores/Theme.js
+++ b/dev/Stores/Theme.js
@ -1,5 +1,4 @@
 import ko from 'ko';
-import { isArray } from 'Common/Utils';
 import * as Settings from 'Storage/Settings';

 class ThemeStore {
@ -14,7 +13,7 @@ class ThemeStore {
 	populate() {
 		const themes = Settings.appSettingsGet('themes');

-		this.themes(isArray(themes) ? themes : []);
+		this.themes(Array.isArray(themes) ? themes : []);
 		this.theme(Settings.settingsGet('Theme'));
 		this.themeBackgroundName(Settings.settingsGet('UserBackgroundName'));
 		this.themeBackgroundHash(Settings.settingsGet('UserBackgroundHash'));
--- a/dev/Stores/User/Folder.js
+++ b/dev/Stores/User/Folder.js
@ -4,7 +4,7 @@ import { settingsGet } from 'Storage/Settings';

 import { FolderType } from 'Common/Enums';
 import { UNUSED_OPTION_VALUE } from 'Common/Consts';
-import { isArray, folderListOptionsBuilder } from 'Common/Utils';
+import { folderListOptionsBuilder } from 'Common/Utils';
 import { getFolderInboxName, getFolderFromCacheList } from 'Common/Cache';

 import { momentNowUnix } from 'Common/Momentor';
@ -72,7 +72,7 @@ class FolderUserStore {
 				trashFolder = this.trashFolder(),
 				archiveFolder = this.archiveFolder();

-			if (isArray(folders) && folders.length) {
+			if (Array.isArray(folders) && folders.length) {
 				if (sentFolder && UNUSED_OPTION_VALUE !== sentFolder) {
 					list.push(sentFolder);
 				}
--- a/dev/Stores/User/Message.js
+++ b/dev/Stores/User/Message.js
@ -1,5 +1,4 @@
 import window from 'window';
-import _ from '_';
 import ko from 'ko';
 import $ from '$';

@ -8,7 +7,6 @@ import { Magics, Layout, Focused, MessageSetAction, StorageResultType, Notificat
 import {
 	trim,
 	isNormal,
-	isArray,
 	pInt,
 	pString,
 	plainToHtml,
@ -102,7 +100,16 @@ class MessageUserStore {

 		this.onMessageResponse = this.onMessageResponse.bind(this);

-		this.purgeMessageBodyCacheThrottle = _.throttle(this.purgeMessageBodyCache, Magics.Time30s);
+		// throttle
+		var t, o = this;
+		this.purgeMessageBodyCacheThrottle = ()=>{
+			if (!t) {
+				t = setTimeout(()=>{
+					o.purgeMessageBodyCache();
+					t = 0;
+				}, Magics.Time30s);
+			}
+		};
 	}

 	computers() {
@ -184,14 +191,17 @@ class MessageUserStore {
 			this.messageListCompleteLoadingThrottleForAnimation(value);
 		});

+		var d;
 		this.messageList.subscribe(
-			_.debounce((list) => {
-				list.forEach(item => {
+			(list)=>{
+				// debounce
+				d && clearTimeout(d);
+				d = setTimeout(()=>list.forEach(item => {
 					if (item && item.newForAnimation()) {
 						item.newForAnimation(false);
 					}
-				});
-			}, Magics.Time500ms)
+				}), Magics.Time500ms);
+			}
 		);

 		this.message.subscribe((message) => {
@ -249,7 +259,7 @@ class MessageUserStore {

 	initUidNextAndNewMessages(folder, uidNext, newMessages) {
 		if (getFolderInboxName() === folder && isNormal(uidNext) && uidNext) {
-			if (isArray(newMessages) && newMessages.length) {
+			if (Array.isArray(newMessages) && newMessages.length) {
 				newMessages.forEach(item => {
 					addNewMessageCache(folder, item.Uid);
 				});
@ -717,7 +727,7 @@ class MessageUserStore {
 			data.Result &&
 			'Collection/MessageCollection' === data.Result['@Object'] &&
 			data.Result['@Collection'] &&
-			isArray(data.Result['@Collection'])
+			Array.isArray(data.Result['@Collection'])
 		) {
 			let newCount = 0,
 				unreadCountChange = false;
--- a/dev/Stores/User/Pgp.js
+++ b/dev/Stores/User/Pgp.js
@ -1,9 +1,8 @@
 import ko from 'ko';
-import _ from '_';
 import $ from '$';

 import { i18n } from 'Common/Translator';
-import { log, isArray, isNonEmptyArray, pString, isUnd, trim } from 'Common/Utils';
+import { log, isNonEmptyArray, pString, trim } from 'Common/Utils';

 import AccountStore from 'Stores/User/Account';

@ -56,7 +55,7 @@ class PgpUserStore {
 	}

 	findPrivateKeysByEncryptionKeyIds(encryptionKeyIds, recipients, returnWrapKeys) {
-		let result = isArray(encryptionKeyIds)
+		let result = Array.isArray(encryptionKeyIds)
 			? encryptionKeyIds.map(id => {
 					const key = id && id.toHex ? this.findPrivateKeyByHex(id.toHex()) : null;
 					return key ? (returnWrapKeys ? [key] : key.getNativeKeys()) : [null];
@ -191,7 +190,7 @@ class PgpUserStore {
 				if (publicKeys && publicKeys.length) {
 					try {
 						const result = message.verify(publicKeys),
-							valid = (_.isArray(result) ? result : []).find(item => item && item.valid && item.keyid);
+							valid = (Array.isArray(result) ? result : []).find(item => item && item.valid && item.keyid);

 						if (valid && valid.keyid && valid.keyid && valid.keyid.toHex) {
 							fCallback(this.findPublicKeyByHex(valid.keyid.toHex()));
@ -232,7 +231,7 @@ class PgpUserStore {
 				.attr('title', title);
 		}

-		if (!isUnd(text)) {
+		if (undefined !== text) {
 			dom.text(trim(text));
 		}
 	}
--- a/dev/View/Popup/Activate.js
+++ b/dev/View/Popup/Activate.js
@ -1,7 +1,7 @@
 import ko from 'ko';

 import { StorageResultType, Notification } from 'Common/Enums';
-import { trim, isUnd } from 'Common/Utils';
+import { trim } from 'Common/Utils';
 import { RAINLOOP_TRIAL_KEY } from 'Common/Consts';
 import { i18n, getNotification } from 'Common/Translator';

@ -89,7 +89,7 @@ class ActivatePopupView extends AbstractViewNext {
 	onShow(isTrial) {
 		this.domain(Settings.settingsGet('AdminDomain'));
 		if (!this.activateProcess()) {
-			isTrial = isUnd(isTrial) ? false : !!isTrial;
+			isTrial = undefined === isTrial ? false : !!isTrial;

 			this.key(isTrial ? RAINLOOP_TRIAL_KEY : '');
 			this.activateText('');
--- a/dev/View/Popup/Ask.js
+++ b/dev/View/Popup/Ask.js
@ -2,7 +2,6 @@ import ko from 'ko';
 import key from 'key';

 import { KeyState } from 'Common/Enums';
-import { isFunc } from 'Common/Utils';
 import { i18n } from 'Common/Translator';

 import { popup } from 'Knoin/Knoin';
@ -46,7 +45,7 @@ class AskPopupView extends AbstractViewNext {
 	yesClick() {
 		this.cancelCommand();

-		if (isFunc(this.fYesAction)) {
+		if (typeof this.fYesAction === 'function') {
 			this.fYesAction.call(null);
 		}
 	}
@ -54,7 +53,7 @@ class AskPopupView extends AbstractViewNext {
 	noClick() {
 		this.cancelCommand();

-		if (isFunc(this.fNoAction)) {
+		if (typeof this.fNoAction === 'function') {
 			this.fNoAction.call(null);
 		}
 	}
--- a/dev/View/Popup/Compose.js
+++ b/dev/View/Popup/Compose.js
@ -1,5 +1,3 @@
-import window from 'window';
-import _ from '_';
 import $ from '$';
 import ko from 'ko';
 import key from 'key';
@ -19,18 +17,15 @@ import {

 import {
 	trim,
-	isArray,
 	isNormal,
 	delegateRun,
 	isNonEmptyArray,
 	clearBqSwitcher,
 	replySubjectAdd,
 	encodeHtml,
-	noopFalse,
 	inFocus,
 	delegateRunOnDestroy,
-	pInt,
-	isUnd
+	pInt
 } from 'Common/Utils';

 import { UNUSED_OPTION_VALUE } from 'Common/Consts';
@ -291,8 +286,8 @@ class ComposePopupView extends AbstractViewNext {
 			}
 		});

-		this.attachmentsInProcess.subscribe((value) => {
-			if (this.attachmentsInProcessError() && isArray(value) && value.length) {
+		this.attachmentsInProcess.subscribe(value => {
+			if (this.attachmentsInProcessError() && isNonEmptyArray(value)) {
 				this.attachmentsInProcessError(false);
 			}
 		});
@ -333,7 +328,12 @@ class ComposePopupView extends AbstractViewNext {
 		this.bDisabeCloseOnEsc = true;
 		this.sDefaultKeyScope = KeyState.Compose;

-		this.tryToClosePopup = _.debounce(this.tryToClosePopup.bind(this), Magics.Time200ms);
+		// debounce
+		var d, fn = this.tryToClosePopup.bind(this);
+		this.tryToClosePopup = ()=>{
+			d && clearTimeout(d);
+			d = setTimeout(fn, Magics.Time200ms);
+		};

 		this.emailsSource = this.emailsSource.bind(this);
 		this.autosaveFunction = this.autosaveFunction.bind(this);
@ -367,7 +367,7 @@ class ComposePopupView extends AbstractViewNext {
 		if (!this.emptyToError() && !this.attachmentsInErrorError() && !this.attachmentsInProcessError()) {
 			if (SettingsStore.replySameFolder()) {
 				if (
-					isArray(this.aDraftInfo) &&
+					Array.isArray(this.aDraftInfo) &&
 					3 === this.aDraftInfo.length &&
 					isNormal(this.aDraftInfo[2]) &&
 					this.aDraftInfo[2].length
@ -386,7 +386,7 @@ class ComposePopupView extends AbstractViewNext {
 				this.sendError(false);
 				this.sending(true);

-				if (isArray(this.aDraftInfo) && 3 === this.aDraftInfo.length) {
+				if (Array.isArray(this.aDraftInfo) && 3 === this.aDraftInfo.length) {
 					const flagsCache = getMessageFlagsFromCache(this.aDraftInfo[2], this.aDraftInfo[1]);
 					if (flagsCache) {
 						if ('forward' === this.aDraftInfo[0]) {
@ -531,12 +531,12 @@ class ComposePopupView extends AbstractViewNext {
 	}

 	autosaveStart() {
-		window.clearTimeout(this.iTimer);
-		this.iTimer = window.setTimeout(this.autosaveFunction, Magics.Time1m);
+		clearTimeout(this.iTimer);
+		this.iTimer = setTimeout(this.autosaveFunction, Magics.Time1m);
 	}

 	autosaveStop() {
-		window.clearTimeout(this.iTimer);
+		clearTimeout(this.iTimer);
 	}

 	emailsSource(oData, fResponse) {
@ -672,7 +672,7 @@ class ComposePopupView extends AbstractViewNext {
 				this.draftFolder(oData.Result.NewFolder);
 				this.draftUid(oData.Result.NewUid);

-				this.savedTime(window.Math.round(new window.Date().getTime() / 1000));
+				this.savedTime(Math.round(new Date().getTime() / 1000));

 				if (this.bFromDraft) {
 					setFolderHash(this.draftFolder(), '');
@ -907,9 +907,9 @@ class ComposePopupView extends AbstractViewNext {
 		oMessageOrArray = oMessageOrArray || null;
 		if (oMessageOrArray && isNormal(oMessageOrArray)) {
 			message =
-				isArray(oMessageOrArray) && 1 === oMessageOrArray.length
+				Array.isArray(oMessageOrArray) && 1 === oMessageOrArray.length
 					? oMessageOrArray[0]
-					: !isArray(oMessageOrArray)
+					: !Array.isArray(oMessageOrArray)
 					? oMessageOrArray
 					: null;
 		}
@ -1207,7 +1207,7 @@ class ComposePopupView extends AbstractViewNext {
 	onBuild() {
 		this.initUploader();

-		key('ctrl+q, command+q, ctrl+w, command+w', KeyState.Compose, noopFalse);
+		key('ctrl+q, command+q, ctrl+w, command+w', KeyState.Compose, ()=>false);

 		key('`', KeyState.Compose, () => {
 			if (this.oEditor && !this.oEditor.hasFocus() && !inFocus()) {
@ -1250,9 +1250,14 @@ class ComposePopupView extends AbstractViewNext {
 		});

 		Events.sub('window.resize.real', this.resizerTrigger);
-		Events.sub('window.resize.real', _.debounce(this.resizerTrigger, Magics.Time50ms));
+		var d, o = this;
+		Events.sub('window.resize.real', ()=>{
+			// debounce
+			d && clearTimeout(d);
+			d = setTimeout(o.resizerTrigger, Magics.Time50ms);
+		});

-		window.setInterval(() => {
+		setInterval(() => {
 			if (this.modalVisibility() && this.oEditor) {
 				this.oEditor.resize();
 			}
@ -1322,13 +1327,13 @@ class ComposePopupView extends AbstractViewNext {
 						}

 						if (item) {
-							item.progress(window.Math.floor((loaded / total) * 100));
+							item.progress(Math.floor((loaded / total) * 100));
 						}
 					})
 					.on('onSelect', (sId, oData) => {
 						this.dragAndDropOver(false);

-						const fileName = isUnd(oData.FileName) ? '' : oData.FileName.toString(),
+						const fileName = undefined === oData.FileName ? '' : oData.FileName.toString(),
 							size = isNormal(oData.Size) ? pInt(oData.Size) : null,
 							attachment = new ComposeAttachmentModel(sId, fileName, size);

@ -1394,7 +1399,7 @@ class ComposePopupView extends AbstractViewNext {
 								attachment.initByUploadJson(attachmentJson);
 							}

-							if (isUnd(uploadCache[id])) {
+							if (undefined === uploadCache[id]) {
 								delete uploadCache[id];
 							}
 						}
--- a/dev/View/Popup/ComposeOpenPgp.js
+++ b/dev/View/Popup/ComposeOpenPgp.js
@ -2,7 +2,7 @@ import $ from '$';
 import ko from 'ko';
 import key from 'key';

-import { pString, log, isUnd, trim, defautOptionsAfterRender } from 'Common/Utils';
+import { pString, log, trim, defautOptionsAfterRender } from 'Common/Utils';

 import { Magics, KeyState } from 'Common/Enums';
 import { i18n } from 'Common/Translator';
@ -102,7 +102,7 @@ class ComposeOpenPgpPopupView extends AbstractViewNext {
 		this.addOptionClass = (domOption, item) => {
 			this.defautOptionsAfterRender(domOption, item);

-			if (item && !isUnd(item.class) && domOption) {
+			if (item && undefined !== item.class && domOption) {
 				$(domOption).addClass(item.class);
 			}
 		};
--- a/dev/View/Popup/Contacts.js
+++ b/dev/View/Popup/Contacts.js
@ -22,8 +22,7 @@ import {
 	windowResizeCallback,
 	isNonEmptyArray,
 	fakeMd5,
-	pInt,
-	isUnd
+	pInt
 } from 'Common/Utils';

 import { CONTACTS_PER_PAGE } from 'Common/Consts';
@ -649,8 +648,8 @@ class ContactsPopupView extends AbstractViewNext {
 	}

 	onShow(bBackToCompose, sLastComposeFocusedField) {
-		this.bBackToCompose = isUnd(bBackToCompose) ? false : !!bBackToCompose;
-		this.sLastComposeFocusedField = isUnd(sLastComposeFocusedField) ? '' : sLastComposeFocusedField;
+		this.bBackToCompose = undefined === bBackToCompose ? false : !!bBackToCompose;
+		this.sLastComposeFocusedField = undefined === sLastComposeFocusedField ? '' : sLastComposeFocusedField;

 		routeOff();
 		this.reloadContactList(true);
--- a/dev/View/Popup/FolderSystem.js
+++ b/dev/View/Popup/FolderSystem.js
@ -1,9 +1,8 @@
-import _ from '_';
 import ko from 'ko';

 import { SetSystemFoldersNotification, Magics } from 'Common/Enums';
 import { UNUSED_OPTION_VALUE } from 'Common/Consts';
-import { folderListOptionsBuilder, noop, defautOptionsAfterRender } from 'Common/Utils';
+import { folderListOptionsBuilder, defautOptionsAfterRender } from 'Common/Utils';
 import { initOnStartOrLangChange, i18n } from 'Common/Translator';

 import FolderStore from 'Stores/User/Folder';
@ -56,6 +55,7 @@ class FolderSystemPopupView extends AbstractViewNext {
 		this.trashFolder = FolderStore.trashFolder;
 		this.archiveFolder = FolderStore.archiveFolder;

+		var d;
 		const fSetSystemFolders = () => {
 				Settings.settingsSet('SentFolder', FolderStore.sentFolder());
 				Settings.settingsSet('DraftFolder', FolderStore.draftFolder());
@ -63,17 +63,21 @@ class FolderSystemPopupView extends AbstractViewNext {
 				Settings.settingsSet('TrashFolder', FolderStore.trashFolder());
 				Settings.settingsSet('ArchiveFolder', FolderStore.archiveFolder());
 			},
-			fSaveSystemFolders = _.debounce(() => {
-				fSetSystemFolders();
-				Remote.saveSystemFolders(noop, {
-					SentFolder: FolderStore.sentFolder(),
-					DraftFolder: FolderStore.draftFolder(),
-					SpamFolder: FolderStore.spamFolder(),
-					TrashFolder: FolderStore.trashFolder(),
-					ArchiveFolder: FolderStore.archiveFolder(),
-					NullFolder: 'NullFolder'
-				});
-			}, Magics.Time1s),
+			fSaveSystemFolders = ()=>{
+				// debounce
+				d && clearTimeout(d);
+				d = setTimeout(()=>{
+					fSetSystemFolders();
+					Remote.saveSystemFolders(()=>{}, {
+						SentFolder: FolderStore.sentFolder(),
+						DraftFolder: FolderStore.draftFolder(),
+						SpamFolder: FolderStore.spamFolder(),
+						TrashFolder: FolderStore.trashFolder(),
+						ArchiveFolder: FolderStore.archiveFolder(),
+						NullFolder: 'NullFolder'
+					});
+				}, Magics.Time1s);
+			},
 			fCallback = () => {
 				fSetSystemFolders();
 				fSaveSystemFolders();
--- a/dev/View/Popup/KeyboardShortcutsHelp.js
+++ b/dev/View/Popup/KeyboardShortcutsHelp.js
@ -1,4 +1,3 @@
-import _ from '_';
 import key from 'key';

 import { KeyState, Magics } from 'Common/Enums';
@ -17,32 +16,39 @@ class KeyboardShortcutsHelpPopupView extends AbstractViewNext {
 	}

 	onBuild(dom) {
+		var t;
 		key(
 			'tab, shift+tab, left, right',
 			KeyState.PopupKeyboardShortcutsHelp,
-			_.throttle((event, handler) => {
-				if (event && handler) {
-					const $tabs = dom.find('.nav.nav-tabs > li'),
-						isNext = handler && ('tab' === handler.shortcut || 'right' === handler.shortcut);
+			(event, handler)=>{
+				// throttle
+				if (!t) {
+					t = setTimeout(()=>{
+						t = 0;
+						if (event && handler) {
+							const $tabs = dom.find('.nav.nav-tabs > li'),
+								isNext = handler && ('tab' === handler.shortcut || 'right' === handler.shortcut);

-					let index = $tabs.index($tabs.filter('.active'));
-					if (!isNext && 0 < index) {
-						index -= 1;
-					} else if (isNext && index < $tabs.length - 1) {
-						index += 1;
-					} else {
-						index = isNext ? 0 : $tabs.length - 1;
-					}
+							let index = $tabs.index($tabs.filter('.active'));
+							if (!isNext && 0 < index) {
+								index -= 1;
+							} else if (isNext && index < $tabs.length - 1) {
+								index += 1;
+							} else {
+								index = isNext ? 0 : $tabs.length - 1;
+							}

-					$tabs
-						.eq(index)
-						.find('a[data-toggle="tab"]')
-						.tab('show');
-					return false;
+							$tabs
+								.eq(index)
+								.find('a[data-toggle="tab"]')
+								.tab('show');
+							return false;
+						}
+
+						return true;
+					}, Magics.Time100ms);
 				}
-
-				return true;
-			}, Magics.Time100ms)
+			}
 		);
 	}
 }
--- a/dev/View/Popup/Plugin.js
+++ b/dev/View/Popup/Plugin.js
@ -1,4 +1,3 @@
-import _ from '_';
 import ko from 'ko';
 import key from 'key';

@ -43,7 +42,12 @@ class PluginPopupView extends AbstractViewNext {
 		this.bDisabeCloseOnEsc = true;
 		this.sDefaultKeyScope = KeyState.All;

-		this.tryToClosePopup = _.debounce(this.tryToClosePopup.bind(this), Magics.Time200ms);
+		var d, fn = this.tryToClosePopup.bind(this);
+		this.tryToClosePopup = ()=>{
+			// debounce
+			d && clearTimeout(d);
+			d = setTimeout(fn, Magics.Time200ms);
+		};
 	}

 	@command((self) => self.hasConfiguration())
--- a/dev/View/User/AbstractSystemDropDown.js
+++ b/dev/View/User/AbstractSystemDropDown.js
@ -6,7 +6,7 @@ import AccountStore from 'Stores/User/Account';
 import MessageStore from 'Stores/User/Message';

 import { Capa, Magics, KeyState } from 'Common/Enums';
-import { trim, isUnd } from 'Common/Utils';
+import { trim } from 'Common/Utils';
 import { settings } from 'Common/Links';

 import * as Events from 'Common/Events';
@ -51,7 +51,7 @@ class AbstractSystemDropDownUserView extends AbstractViewNext {
 	}

 	accountClick(account, event) {
-		if (account && event && !isUnd(event.which) && 1 === event.which) {
+		if (account && event && undefined !== event.which && 1 === event.which) {
 			AccountStore.accounts.loading(true);
 			setTimeout(() => AccountStore.accounts.loading(false), Magics.Time1s);
 		}
--- a/dev/View/User/MailBox/FolderList.js
+++ b/dev/View/User/MailBox/FolderList.js
@ -3,7 +3,7 @@ import $ from '$';
 import ko from 'ko';
 import key from 'key';

-import { trim, isNormal, isArray, windowResize } from 'Common/Utils';
+import { trim, isNormal, windowResize } from 'Common/Utils';
 import { Capa, Focused, Layout, KeyState, EventKeyCode, Magics } from 'Common/Enums';
 import { $htmlCL, leftPanelDisabled, moveAction } from 'Common/Globals';
 import { mailBox, settings } from 'Common/Links';
@ -245,7 +245,7 @@ class FolderListMailBoxUserView extends AbstractViewNext {
 				copy = $htmlCL.contains('rl-ctrl-key-pressed'),
 				uids = ui.helper.data('rl-uids');

-			if (fromFolderFullNameRaw && isNormal(fromFolderFullNameRaw) && isArray(uids)) {
+			if (fromFolderFullNameRaw && isNormal(fromFolderFullNameRaw) && Array.isArray(uids)) {
 				getApp().moveMessagesToFolder(fromFolderFullNameRaw, uids, toFolder.fullNameRaw, copy);
 			}
 		}
--- a/dev/View/User/MailBox/MessageList.js
+++ b/dev/View/User/MailBox/MessageList.js
@ -1,5 +1,4 @@
 import window from 'window';
-import _ from '_';
 import $ from '$';
 import ko from 'ko';
 import key from 'key';
@ -22,7 +21,7 @@ import { UNUSED_OPTION_VALUE } from 'Common/Consts';

 import { bMobileDevice, popupVisibility, leftPanelDisabled, moveAction } from 'Common/Globals';

-import { noop, noopFalse, computedPagenatorHelper, draggablePlace, friendlySize, isUnd } from 'Common/Utils';
+import { computedPagenatorHelper, draggablePlace, friendlySize } from 'Common/Utils';

 import { mailBox, append } from 'Common/Links';
 import { Selector } from 'Common/Selector';
@ -401,7 +400,7 @@ class MessageListMailBoxUserView extends AbstractViewNext {
 		}

 		window.clearTimeout(this.iGoToUpUpOrDownDownTimeout);
-		this.iGoToUpUpOrDownDownTimeout = window.setTimeout(() => {
+		this.iGoToUpUpOrDownDownTimeout = setTimeout(() => {
 			let prev = null,
 				next = null,
 				temp = null,
@ -516,7 +515,7 @@ class MessageListMailBoxUserView extends AbstractViewNext {
 		el.data('rl-folder', FolderStore.currentFolderFullNameRaw());

 		updateUidsInfo();
-		_.defer(updateUidsInfo);
+		setTimeout(updateUidsInfo,1);

 		return el;
 	}
@ -569,7 +568,7 @@ class MessageListMailBoxUserView extends AbstractViewNext {
 							clearMessageFlagsFromCacheByFolder(sFolderFullNameRaw);
 						}

-						Remote.messageSetSeenToAll(noop, sFolderFullNameRaw, true, sThreadUid ? uids : null);
+						Remote.messageSetSeenToAll(()=>{}, sFolderFullNameRaw, true, sThreadUid ? uids : null);
 						break;
 					case MessageSetAction.UnsetSeen:
 						folder = getFolderFromCacheList(sFolderFullNameRaw);
@ -595,7 +594,7 @@ class MessageListMailBoxUserView extends AbstractViewNext {
 							clearMessageFlagsFromCacheByFolder(sFolderFullNameRaw);
 						}

-						Remote.messageSetSeenToAll(noop, sFolderFullNameRaw, false, sThreadUid ? uids : null);
+						Remote.messageSetSeenToAll(()=>{}, sFolderFullNameRaw, false, sThreadUid ? uids : null);
 						break;
 					// no default
 				}
@ -668,7 +667,7 @@ class MessageListMailBoxUserView extends AbstractViewNext {
 	flagMessagesFast(bFlag) {
 		const checked = this.messageListCheckedOrSelected();
 		if (checked.length) {
-			if (isUnd(bFlag)) {
+			if (undefined === bFlag) {
 				const flagged = checked.filter(message => message.flagged());
 				this.setAction(
 					checked[0].folderFullNameRaw,
@ -688,7 +687,7 @@ class MessageListMailBoxUserView extends AbstractViewNext {
 	seenMessagesFast(seen) {
 		const checked = this.messageListCheckedOrSelected();
 		if (checked.length) {
-			if (isUnd(seen)) {
+			if (undefined === seen) {
 				const unseen = checked.filter(message => message.unseen());
 				this.setAction(
 					checked[0].folderFullNameRaw,
@ -932,8 +931,8 @@ class MessageListMailBoxUserView extends AbstractViewNext {
 			return false;
 		});

-		key('ctrl+left, command+left', KeyState.MessageView, noopFalse);
-		key('ctrl+right, command+right', KeyState.MessageView, noopFalse);
+		key('ctrl+left, command+left', KeyState.MessageView, ()=>false);
+		key('ctrl+right, command+right', KeyState.MessageView, ()=>false);
 	}

 	prefetchNextTick() {
--- a/dev/View/User/MailBox/MessageView.js
+++ b/dev/View/User/MailBox/MessageView.js
@ -1,4 +1,3 @@
-import _ from '_';
 import $ from '$';
 import ko from 'ko';
 import key from 'key';
@ -22,7 +21,6 @@ import { $htmlCL, leftPanelDisabled, keyScopeReal, useKeyboardShortcuts, moveAct
 import {
 	isNonEmptyArray,
 	trim,
-	noop,
 	windowResize,
 	windowResizeCallback,
 	inFocus,
@ -542,13 +540,20 @@ class MessageViewMailBoxUserView extends AbstractViewNext {
 		this.showFullInfo.subscribe(fCheckHeaderHeight);
 		this.message.subscribe(fCheckHeaderHeight);

+		var t;
 		Events.sub(
 			'window.resize',
-			_.throttle(() => {
-				setTimeout(fCheckHeaderHeight, 1);
-				setTimeout(fCheckHeaderHeight, Magics.Time200ms);
-				setTimeout(fCheckHeaderHeight, Magics.Time500ms);
-			}, Magics.Time50ms)
+			()=>{
+				// throttle
+				if (!t) {
+					t = setTimeout(()=>{
+						setTimeout(fCheckHeaderHeight, 1);
+						setTimeout(fCheckHeaderHeight, Magics.Time200ms);
+						setTimeout(fCheckHeaderHeight, Magics.Time500ms);
+						t = 0;
+					}, Magics.Time50ms);
+				}
+			}
 		);

 		this.showFullInfo.subscribe((value) => {
@ -932,7 +937,7 @@ class MessageViewMailBoxUserView extends AbstractViewNext {
 	readReceipt(oMessage) {
 		if (oMessage && oMessage.readReceipt()) {
 			Remote.sendReadReceiptMessage(
-				noop,
+				()=>{},
 				oMessage.folderFullNameRaw,
 				oMessage.uid,
 				oMessage.readReceipt(),
--- a/dev/bootstrap.js
+++ b/dev/bootstrap.js
@ -1,5 +1,5 @@
 import window from 'window';
-import { killCtrlACtrlS, detectDropdownVisibility, createCommandLegacy, domReady } from 'Common/Utils';
+import { detectDropdownVisibility, createCommandLegacy, domReady } from 'Common/Utils';
 import { $html, $htmlCL, data as GlobalsData, bMobileDevice } from 'Common/Globals';
 import * as Enums from 'Common/Enums';
 import * as Plugins from 'Common/Plugins';
@ -9,7 +9,32 @@ import { EmailModel } from 'Model/Email';
 export default (App) => {
 	GlobalsData.__APP__ = App;

-	window.addEventListener('keydown', killCtrlACtrlS);
+	window.addEventListener('keydown', event => {
+		event = event || window.event;
+		if (event && event.ctrlKey && !event.shiftKey && !event.altKey) {
+			const key = event.keyCode || event.which;
+			if (key === Enums.EventKeyCode.S) {
+				event.preventDefault();
+				return;
+			} else if (key === Enums.EventKeyCode.A) {
+				const sender = event.target || event.srcElement;
+				if (
+					sender &&
+					('true' === '' + sender.contentEditable || (sender.tagName && sender.tagName.match(/INPUT|TEXTAREA/i)))
+				) {
+					return;
+				}
+
+				if (window.getSelection) {
+					window.getSelection().removeAllRanges();
+				} else if (window.document.selection && window.document.selection.clear) {
+					window.document.selection.clear();
+				}
+
+				event.preventDefault();
+			}
+		}
+	});
 	window.addEventListener('unload', () => {
 		GlobalsData.bUnload = true;
 	});
--- a/tasks/config.js
+++ b/tasks/config.js
@ -83,7 +83,6 @@ config.paths.js = {
 			'vendors/keymaster/keymaster.js', // custom (modified)
 			'vendors/qr.js/qr.min.js', // fixed (license)
 			'vendors/bootstrap/js/bootstrap.min.js', // fixed
-			'vendors/underscore/underscore-min.custom.js',
 			'node_modules/moment/min/moment.min.js',
 			'node_modules/knockout/build/output/knockout-latest.js',
 			'node_modules/knockout-sortable/build/knockout-sortable.min.js ',
--- a/vendors/underscore/underscore-min.custom.js
+++ b/vendors/underscore/underscore-min.custom.js
@ -1,6 +0,0 @@
-//     Underscore.js 1.9.2
-//     https://underscorejs.org
-//     (c) 2009-2018 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
-//     Underscore may be freely distributed under the MIT license.
-
-(()=>{var e=function(){};("object"==typeof self&&self.self===self&&self||{})._=e;e.defer=(()=>{var e=(e,t,...l)=>setTimeout(()=>e.apply(null,l),t),t=function(...l){for(var n=1,r=[l[0],1];n<l.length;)r.push(l[n++]);return function(e,t,l,n,r){if(!(n instanceof t))return e.apply(l,r);var u=e.prototype,a="object"!=typeof u?{}:Object.create(u),o=e.apply(a,r);return"object"==typeof o?o:a}(e,t,this,this,r)};return t})(),e.throttle=function(e,t,l){l||(l={});var n,r,u,a,o=0,i=function(){o=!1===l.leading?0:Date.now(),n=null,a=e.apply(r,u),n||(r=u=null)},c=(...u)=>{var c=Date.now();o||!1!==l.leading||(o=c);var p=t-(c-o);return r=this,p<=0||p>t?(n&&(clearTimeout(n),n=null),o=c,a=e.apply(r,u),n||(r=u=null)):n||!1===l.trailing||(n=setTimeout(i,p)),a};return c.cancel=(()=>{clearTimeout(n),o=0,n=r=u=null}),c},e.debounce=function(e,t,l){var n,r,u=(t,l)=>{n=null,l&&(r=e.apply(t,l))},a=function(...a){if(n&&clearTimeout(n),l){var o=!n;n=setTimeout(u,t),o&&(r=e.apply(this,a))}else{var i=this;n=setTimeout(()=>u.apply(null,[i,a]),t)}return r};return a.cancel=(()=>{clearTimeout(n),n=null}),a}})();
--- a/vendors/underscore/underscore.custom.js
+++ b/vendors/underscore/underscore.custom.js
@ -1,124 +0,0 @@
-//     Underscore.js 1.9.2
-//     https://underscorejs.org
-//     (c) 2009-2018 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
-//     Underscore may be freely distributed under the MIT license.
-/*
-_.debounce
-_.defer
-_.throttle
-*/
-
-(() => {
-
-  // Baseline setup
-  // --------------
-
-  // Create a safe reference to the Underscore object for use below.
-  var _ = function() { };
-
-  // Establish the root object, `window` (`self`) in the browser.
-  // We use `self`instead of `window` for `WebWorker` support.
-  (typeof self == 'object' && self.self === self && self || {})._ = _;
-
-  // Function (ahem) Functions
-  // ------------------
-
-  // Determines whether to execute a function as a constructor
-  // or a normal function with the provided arguments.
-  var executeBound = function(sourceFunc, boundFunc, context, callingContext, args) {
-    if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
-    var fp = sourceFunc.prototype,
-      self = (typeof fp !== 'object') ? {} : Object.create(fp),
-      result = sourceFunc.apply(self, args);
-    return (typeof result === 'object') ? result : self;
-  };
-
-  // Defers a function, scheduling it to run after the current call stack has
-  // cleared.
-  _.defer = (() => {
-    var func = (func, wait, ...args) => setTimeout(() => func.apply(null, args), wait),
-      bound = function(...params) {
-        var pos = 1,
-          args = [params[0], 1];
-        while (pos < params.length) args.push(params[pos++]);
-        return executeBound(func, bound, this, this, args);
-      };
-    return bound;
-  })();
-
-  // Returns a function, that, when invoked, will only be triggered at most once
-  // during a given window of time. Normally, the throttled function will run
-  // as much as it can, without ever going more than once per `wait` duration;
-  // but if you'd like to disable the execution on the leading edge, pass
-  // `{leading: false}`. To disable execution on the trailing edge, ditto.
-  _.throttle = function(func, wait, options) {
-    if (!options) options = {};
-    var timeout, context, args, result,
-      previous = 0,
-      later = function() {
-        previous = options.leading === false ? 0 : Date.now();
-        timeout = null;
-        result = func.apply(context, args);
-        if (!timeout) context = args = null;
-      },
-      throttle = (...args) => {
-        var now = Date.now();
-        if (!previous && options.leading === false) previous = now;
-        var remaining = wait - (now - previous);
-        context = this;
-        if (remaining <= 0 || remaining > wait) {
-          if (timeout) {
-            clearTimeout(timeout);
-            timeout = null;
-          }
-          previous = now;
-          result = func.apply(context, args);
-          if (!timeout) context = args = null;
-        } else if (!timeout && options.trailing !== false) {
-          timeout = setTimeout(later, remaining);
-        }
-        return result;
-      };
-
-    throttle.cancel = () => {
-      clearTimeout(timeout);
-      previous = 0;
-      timeout = context = args = null;
-    };
-
-    return throttle;
-  };
-
-  // Returns a function, that, as long as it continues to be invoked, will not
-  // be triggered. The function will be called after it stops being called for
-  // N milliseconds. If `immediate` is passed, trigger the function on the
-  // leading edge, instead of the trailing.
-  _.debounce = function(func, wait, immediate) {
-    var timeout, result,
-      later = (context, args) => {
-        timeout = null;
-        if (args) result = func.apply(context, args);
-      },
-      debounce = function(...args) {
-        if (timeout) clearTimeout(timeout);
-        if (immediate) {
-          var callNow = !timeout;
-          timeout = setTimeout(later, wait);
-          if (callNow) result = func.apply(this, args);
-        } else {
-          var obj = this;
-          timeout = setTimeout(() => later.apply(null, [obj, args]), wait);
-        }
-
-        return result;
-      };
-
-    debounce.cancel = () => {
-      clearTimeout(timeout);
-      timeout = null;
-    };
-
-    return debounce;
-  };
-
-})();