(js) Add CKEditor pastefromexcel plugin

Fixes #3854

NEWS

@@ -25,9 +25,10 @@ Bug fixes
  - [web] fixed auto-completion of list members (#3870)
  - [web] added missing options to subscribed addressbooks (#3850)
  - [web] added missing options to subscribed calendars (#3863)
- - [web] fixed resource conflict error handling (403 vs 409 HTTP code)
+ - [web] fixed resource conflict error handling (403 vs 409 HTTP code) (#3837)
  - [web] restored immediate deletion of messages (without moving them to the trash)
  - [web] avoid mail notifications on superfluous event changes (#3790)
+ - [web] CKEditor: added the pastefromexcel plugin (#3854)
  - [eas] improve handling of email folders without a parent
  - [eas] never send IMIP reply when the "initiator" is Outlook 2013/2016
  - [core] only consider SMTP addresses for AD's proxyAddresses (#3842)

UI/WebServerResources/js/vendor/ckeditor/build-config.js

@@ -13,10 +13,10 @@
  * (1) http://ckeditor.com/builder
  *     Visit online builder to build CKEditor from scratch.
  *
- * (2) http://ckeditor.com/builder/d97b6d42ea158d15ebe90da9451162c5
+ * (2) http://ckeditor.com/builder/1f054d16e7bf94d785cd4a259c345f4c
  *     Visit online builder to build CKEditor, starting with the same setup as before.
  *
- * (3) http://ckeditor.com/builder/download/d97b6d42ea158d15ebe90da9451162c5
+ * (3) http://ckeditor.com/builder/download/1f054d16e7bf94d785cd4a259c345f4c
  *     Straight download link to the latest version of CKEditor (Optimized) with the same setup as before.
  *
  * NOTE:
@@ -80,6 +80,7 @@ var CKBUILDER_CONFIG = {
 		'onchange' : 1,
 		'panel' : 1,
 		'panelbutton' : 1,
+		'pastefromexcel' : 1,
 		'pastefromword' : 1,
 		'pastetext' : 1,
 		'richcombo' : 1,