Ticket #39362: 39362.2.patch

customize-nav-menus.js

@@ -1000 +1000 @@
                                 menuAutoAddControl = new api.controlConstructor.nav_menu_auto_add( menuAutoAddControlId, {
                                         params: {
                                                 type: 'nav_menu_auto_add',
-                                                content: '<li id="customize-control-' + section.id.replace( '[', '-' ).replace( ']', '' ) + '-auto-add" class="customize-control customize-control-nav_menu_auto_add"></li>', // @todo core should do this for us
+                                                content: '<li id="customize-control-' + section.id.replace( '[', '-' ).replace( ']', '' ) + '-auto-add" class="customize-control customize-control-nav_menu_auto_add customize-control-checkbox"></li>', // @todo core should do this for us
                                                 label: '',
                                                 active: true,
                                                 section: section.id,