added buttons for resetting to defaults in samples and changed defaults, added loading spinner and added apply filters button (again)

src/app/users/users.component.ts

@@ -4,6 +4,7 @@ import {UserModel} from '../models/user.model';
 import {LoginService} from '../services/login.service';
 import {ModalService} from '@inst-iot/bosch-angular-ui-components';
 
+// TODO: somehow mail change triggered
 
 @Component({
   selector: 'app-users',