Reviewed plugins dependencies. Fixes #13056.

Author: Reinmar

plugins/notification/plugin.js

@@ -7,6 +7,7 @@
 
 CKEDITOR.plugins.add( 'notification', {
 	lang: 'en', // %REMOVE_LINE_CORE%
+	requires: 'toolbar',
 
 	init: function( editor ) {
 		editor._.notificationArea = new Area( editor );

plugins/uploadimage/plugin.js

@@ -18,7 +18,7 @@
 		},
 
 		init: function( editor ) {
-			// Do not execute this paste lister if it will not be possible to upload file.
+			// Do not execute this paste listener if it will not be possible to upload file.
 			if ( !CKEDITOR.plugins.clipboard.isFileApiSupported ) {
 				return;
 			}