[TASK] Dont interferre with BE Nav in V11

Resources/Public/JavaScript/Backend.js

@@ -39,8 +39,10 @@ define([
 				this.form.submit();
 			});
 			$('.sg-news_pageswitch').on('click', function(event) {
-				event.preventDefault();
-				SgNewsModule.goTo('web_SgNewsNews', event.target.dataset.page, event.target.dataset.path);
+				if(Viewport.NavigationContainer.PageTree !== undefined) {
+					event.preventDefault();
+					SgNewsModule.goTo('web_SgNewsNews', event.target.dataset.page, event.target.dataset.path);
+				}
 			});
 		},