UI: Browser widget fix

Fix elems.undefined error, which happens when destroyed panel
continues to animate.

-- This happened particularly in the domain section, when clicking
to/from another section while the details panel was sliding in.

ui/scripts/ui/widgets/cloudBrowser.js

@@ -369,6 +369,7 @@
      * Clear all panels
      */
     removeAllPanels: function(args) {
+      $('div.panel').stop(); // Prevent destroyed panels from animating
       this.element.find('div.panel').remove();
       $('#breadcrumbs').find('ul li').remove();
       $('#breadcrumbs').find('ul div.end').remove();