fix(admin): fix ExpressionChangedAfterItHasBeenCheckedError on applications page

* correctly set loading before loading of preferences and update after changes in dynamic list

Author: xflord

apps/admin-gui/src/app/shared/components/application-actions/application-actions.component.ts

@@ -107,6 +107,7 @@ export class ApplicationActionsComponent implements OnInit {
   ) {}
 
   @Input() set viewPreferences(att: Attribute) {
+    this.loading$ = of(true);
     if ((att?.value as Array<string>)?.length > 0) {
       this.configuredColumns = att.value as Array<string>;
       this.configuredFedColumns = this.configuredColumns.filter((column) =>

libs/perun/components/src/lib/applications-dynamic-list/applications-dynamic-list.component.ts

@@ -145,6 +145,7 @@ export class ApplicationsDynamicListComponent implements OnInit, OnChanges, Afte
     if (this.dataSource) {
       this.child.paginator.pageIndex = 0;
       this.loadApplicationsPage();
+      this.loading$.emit(this.dataSource.loading$);
     }
     this.selection.clear();
   }