Ticket #28987: 28987.patch

src/wp-admin/themes.php

@@ -153 +153 @@
         if ( is_array( $submenu ) && isset( $submenu['themes.php'] ) ) {
                 foreach ( (array) $submenu['themes.php'] as $item) {
                         $class = '';
-                        if ( 'themes.php' == $item[2] || 'theme-editor.php' == $item[2] || 'customize.php' == $item[2] )
+                        if ( 'themes.php' == $item[2] || 'theme-editor.php' == $item[2] || false !== strpos( $item[2], 'customize.php') )
                                 continue;
                         // 0 = name, 1 = capability, 2 = file
                         if ( ( strcmp($self, $item[2]) == 0 && empty($parent_file)) || ($parent_file && ($item[2] == $parent_file)) )