Ticket #16972: 16972.3.diff

wp-admin/js/postbox.js

@@ -10 +10 @@
                         $('.postbox h3, .postbox .handlediv').bind('click.postboxes', function() {
                                 var p = $(this).parent('.postbox'), id = p.attr('id');
 
-                                if ( 'dashboard_browser_nag' == id )
+                                if ( 'dashboard_browser_nag' == id || $(this).parent().hasClass('was-sorted') )
                                         return;
 
                                 p.toggleClass('closed');
@@ -77 +77 @@
                                 distance: 2,
                                 tolerance: 'pointer',
                                 forcePlaceholderSize: true,
-                                helper: 'clone',
                                 opacity: 0.65,
+                                start: function (e,ui) {
+                                        $(ui.item[0]).addClass('was-sorted');
+                                },
                                 stop: function(e,ui) {
                                         if ( $(this).find('#dashboard_browser_nag').is(':visible') && 'dashboard_browser_nag' != this.firstChild.id ) {
                                                 $(this).sortable('cancel');
                                                 return;
                                         }
+                                        
+                                        setTimeout(function () {
+                                                $(ui.item[0]).removeClass('was-sorted');
+                                        }, 50);
 
                                         postboxes.save_order(page);
                                 },