Ticket #27299: 27299.patch

wp-admin/includes/widgets.php

@@ -16 +16 @@
 
         $sort = $wp_registered_widgets;
         usort( $sort, '_sort_name_callback' );
+        $sort = apply_filters( 'available_widgets_order', $sort );
+        
         $done = array();
 
         foreach ( $sort as $widget ) {