Ticket #41158: 41158.2.diff

src/wp-admin/js/widgets/text-widgets.js

@@ -130 +130 @@
                                         wp.editor.remove( id );
                                 }
 
-                                // Adjust z-index for the customizer.
-                                window.tinymce.ui.FloatPanel.zIndex = 500001;
-
                                 wp.editor.initialize( id, {
                                         tinymce: {
                                                 wpautop: true

src/wp-includes/class-wp-customize-manager.php

@@ -3338 +3338 @@
          * @since 3.4.0
          */
         public function enqueue_control_scripts() {
+                wp_add_inline_script( 'editor', 'jQuery( document ).one( "wp-before-tinymce-init", function() { if ( ! tinymce.ui.FloatPanel.zIndex || tinymce.ui.FloatPanel.zIndex < 500001 ) { tinymce.ui.FloatPanel.zIndex = 500001; } } );' );
+
                 foreach ( $this->controls as $control ) {
                         $control->enqueue();
                 }