Ticket #23427: 23427.2.patch

src/wp-admin/js/common.js

@@ -160 +160 @@
 });
 
 $(document).ready( function() {
-        var lastClicked = false, checks, first, last, checked, menu = $('#adminmenu'), mobileEvent,
+        var lastClicked = false, checks, first, last, checked, sliced, menu = $('#adminmenu'), mobileEvent,
                 pageInput = $('input.current-page'), currentPage = pageInput.val();
 
         // when the menu is folded, make the fly-out submenu header clickable
@@ -286 +286 @@
                         last = checks.index( this );
                         checked = $(this).prop('checked');
                         if ( 0 < first && 0 < last && first != last ) {
-                                checks.slice( first, last ).prop( 'checked', function(){
+                                sliced = ( last > first ) ? checks.slice( first, last ) : checks.slice( last, first );
+                                sliced.prop( 'checked', function() {
                                         if ( $(this).closest('tr').is(':visible') )
                                                 return checked;