Fix add widget modal

modules/cms-kit/src/Volo.CmsKit.Admin.Web/Pages/CmsKit/Contents/addWidgetModal.js

@@ -13,6 +13,10 @@ $(function () {
 
                 $('.widget-detail').attr('hidden', 'true');
                 
+                if(activeEditor){
+                    activeEditor.attr('hidden', 'true');
+                }
+                
                 activeEditor = $('#editor-' + widgetName);
                 activeEditor.removeAttr('hidden');