[TASK] Disable PageTree update in V11

Resources/Public/JavaScript/Backend/SgJobs.js

@@ -32,8 +32,10 @@ define([
 		init: function() {
 			$(document).ready(function() {
 				$('.sg-jobs_pageswitch').on('click', function(event) {
-					event.preventDefault();
-					SgJobs.goTo('web_SgJobsBackend', event.target.dataset.page);
+					if(Viewport.NavigationContainer.PageTree !== undefined) {
+						event.preventDefault();
+						SgJobs.goTo('web_SgJobsBackend', event.target.dataset.page);
+					}
 				});
 				$('#filter-reset-btn').on('click', function(event) {
 					event.preventDefault();