update(tray): Show 'Open Inbox' tray menu option and option to disable

tray  on Mac and Linux

- Resolves #673
- Resolves #762
- Resolves #594

internal_packages/system-tray/lib/system-tray.es6

@@ -11,6 +11,7 @@ class SystemTray {
     this._tray = new Tray(this._store.icon());
     this._tray.setToolTip(this._store.tooltip());
 
+    // Check in case there is no menu for the current platform
     const menu = this._store.menu();
     if (menu != null) this._tray.setContextMenu(menu);
 

internal_packages/system-tray/lib/tray-store.es6

@@ -11,7 +11,7 @@ const {canvasWithSystemTrayIconAndText} = CanvasUtils;
 const BASE_ICON_PATH = path.join(__dirname, '..', 'assets', process.platform, 'ic-systemtray-nylas.png');
 const UNREAD_ICON_PATH = path.join(__dirname, '..', 'assets', process.platform, 'ic-systemtray-nylas-unread.png');
 
-const menuTemplate = [
+const _menuTemplate = [
   {
     label: 'New Message',
     click: ()=> ipcRenderer.send('command', 'application:new-message'),
@@ -29,15 +29,15 @@ const menuTemplate = [
   },
 ];
 
-if (process.platform === 'darwin') {
+if (process.platform !== 'win32') {
-  menuTemplate.unshift({
+  _menuTemplate.unshift({
     label: 'Open Inbox',
     click: ()=> ipcRenderer.send('command', 'application:show-main-window'),
   });
 }
 
 const _buildMenu = ()=> {
-  return Menu.buildFromTemplate(menuTemplate);
+  return Menu.buildFromTemplate(_menuTemplate);
 };
 
 class TrayStore extends NylasStore {

src/config-schema.coffee

@@ -12,8 +12,8 @@ module.exports =
           systemTray:
             type: 'boolean'
             default: true
-            title: "Show icon in Mac OS X menu bar"
+            title: "Show icon in menu bar"
-            platforms: ['darwin']
+            platforms: ['darwin', 'linux']
           showImportant:
             type: 'boolean'
             default: true