Ticket #37575: 37575_1.patch

wp-admin/js/customize-nav-menus.js

@@ -446 +446 @@
                                 'url': itemUrl.val(),
                                 'type': 'custom',
                                 'type_label': api.Menus.data.l10n.custom_label,
-                                'object': ''
+                                'object': 'custom'
                         };
 
                         this.currentMenuControl.addItemToMenu( menuItem );