Merges configuration before replacing the dragresize plugins to make sure our choice prevails

Fixes #716

Author: antoniopol06

src/ui/react/src/adapter/alloy-editor.js

@@ -43,13 +43,13 @@
 
             editor.config.selectionKeystrokes = this.get('selectionKeystrokes');
 
+            AlloyEditor.Lang.mix(editor.config, config);
+
             if (CKEDITOR.env.ie) {
                 editor.config.extraPlugins = editor.config.extraPlugins.replace('ae_dragresize', 'ae_dragresize_ie');
                 editor.config.removePlugins = editor.config.removePlugins.replace('ae_dragresize', 'ae_dragresize_ie');
             }
 
-            AlloyEditor.Lang.mix(editor.config, config);
-
             editor.once('contentDom', function() {
 
                 this._addReadOnlyLinkClickListener(editor);