fix(sidebar): Prevent error in snooze item when category doesnt exist

- Add Snooze category to locked and hidden categories to prevent from
  directly moving stuff to it and showing up in the user categories
  section

internal_packages/account-sidebar/lib/sidebar-item.coffee

@@ -115,10 +115,13 @@ class SidebarItem
     id += "-#{opts.name}" if opts.name
     opts.name = "Snoozed" unless opts.name
     opts.iconName= 'snooze.png'
+
     categories = accountIds.map (accId) =>
       _.findWhere CategoryStore.userCategories(accId), {displayName}
+    categories = _.compact(categories)
 
     perspective = MailboxPerspective.forCategories(categories)
+    perspective.name = id unless perspective.name
     @forPerspective(id, perspective, opts)
 
   @forStarred: (accountIds, opts = {}) ->

src/flux/models/category.coffee

@@ -18,6 +18,7 @@ StandardCategories = {
 
 LockedCategories = {
   "sent"
+  "N1-Snoozed"
 }
 
 HiddenCategories = {
@@ -27,6 +28,7 @@ HiddenCategories = {
   "archive"
   "starred"
   "important"
+  "N1-Snoozed"
 }
 
 AllMailName = "all"
@@ -110,10 +112,10 @@ class Category extends Model
       StandardCategories[@name]? and @name isnt 'important'
 
   isLockedCategory: ->
-    LockedCategories[@name]?
+    LockedCategories[@name]? or LockedCategories[@displayName]?
 
   isHiddenCategory: ->
-    HiddenCategories[@name]?
+    HiddenCategories[@name]? or HiddenCategories[@displayName]?
 
   isUserCategory: ->
     not @isStandardCategory() and not @isHiddenCategory()