Merge branch 'develop'

backend/web/js/backend.js

@@ -70,9 +70,12 @@ var UrlManager = {
 };
 
 function opendistrib_dashboard_admin_statistics() {
-    $.get(UrlManager.getBaseUrl() + 'dashboard-admin/ajax-statistics-html', {}, function(result) {
-        $('#dashboard-admin-statistics-html').html(result);
-    });
+    var selector = '#dashboard-admin-statistics-html';
+    if($(selector).length) {
+        $.get(UrlManager.getBaseUrl() + 'dashboard-admin/ajax-statistics-html', {}, function(result) {
+            $(selector).html(result);
+        });
+    }
 }
 
 function opendistrib_check_all_checkboxes() {