Ticket #15480: 15480_using_index.diff

wp-admin/js/list-table.dev.js

@@ -206 +206 @@
 
                 var $link = $(this),
                         $th = $link.parent('th'),
+                        thIndex = $th.index(),
                         orderby = $.query.load( $link.attr('href') ).get('orderby'),
                         order;
 
+                // th should include both headers in thead and tfoot
+                $th = $th.closest('table').find('thead th:eq(' + thIndex + '), tfoot th:eq(' + thIndex + ')');
+
                 if ( orderby == $.query.get('orderby') ) {
                         // changing the direction
                         order = ( 'asc' == $.query.get('order') ) ? 'desc' : 'asc';