fix(notifs): Categories inside Threads need accountId. Fixes #1155

internal_packages/unread-notifications/lib/main.coffee

@@ -5,6 +5,7 @@ _ = require 'underscore'
  AccountStore,
  CategoryStore,
  SoundRegistry,
+ FocusedPerspectiveStore,
  NativeNotifications,
  DatabaseStore} = require 'nylas-exports'
 
@@ -56,9 +57,14 @@ module.exports =
         else
           NylasEnv.displayWindow()
 
-          filter = MailboxPerspective.forCategory(thread.categoryNamed('inbox'))
+        currentCategories = FocusedPerspectiveStore.current().categories()
+        desiredCategory = thread.categoryNamed('inbox')
+
+        return unless desiredCategory
+        unless desiredCategory.id in _.pluck(currentCategories, 'id')
+          filter = MailboxPerspective.forCategory(desiredCategory)
           Actions.focusMailboxPerspective(filter)
-          Actions.setFocus(collection: 'thread', item: thread)
+        Actions.setFocus(collection: 'thread', item: thread)
 
   _notifyMessages: ->
     if @stack.length >= 5

src/flux/models/thread.coffee

@@ -109,9 +109,10 @@ class Thread extends Model
     if value
       @categories = @constructor.attributes.categories.fromJSON(value)
 
-    if @participants
-      for contact in @participants
-        contact.accountId = @accountId
+    for attr in ['participants', 'categories']
+      value = @[attr]
+      continue unless value and value instanceof Array
+      item.accountId = @accountId for item in value
 
     @