FIX #14839 TIME 0:10 fix click of undefined + add success notification

src/frontend/app/administration/administration.service.ts

@@ -193,7 +193,9 @@ export class AdministrationService {
 
         // WORKAROUND TO SHOW ARROW DEFAULT FILTER
         const element: HTMLElement = document.getElementsByClassName('mat-column-' + this.getFilter('sort'))[0] as HTMLElement;
-        element.click();
+        if (document.getElementsByClassName('mat-column-' + this.getFilter('sort')).length > 0) {
+            element.click();
+        }
         if (this.getFilter('sortDirection') === 'desc') {
             element.click();
         }

src/frontend/app/administration/multigest/multigest-list-administration.component.ts

@@ -117,6 +117,9 @@ export class MultigestListAdministrationComponent implements OnInit {
 
     saveUrl() {
         this.http.put('../rest/multigest/configuration', { uri: this.multigestUrl }).pipe(
+            tap(() => {
+                this.notify.success(this.translate.instant('lang.dataUpdated'));
+            }),
             catchError((err: any) => {
                 this.notify.handleSoftErrors(err);
                 return of(false);