Track custom actions so they don't get destroyed

https://community.openproject.org/work_packages/45677

frontend/src/app/features/work-packages/components/wp-custom-actions/wp-custom-actions.component.html

@@ -1,5 +1,5 @@
 <wp-custom-action
-    *ngFor="let action of actions"
+    *ngFor="let action of actions; trackBy: trackByHref"
     [workPackage]="workPackage"
     [action]="action"
     class="custom-action">

frontend/src/app/features/work-packages/components/wp-custom-actions/wp-custom-actions.component.ts

@@ -33,6 +33,7 @@ import { WorkPackageResource } from 'core-app/features/hal/resources/work-packag
 import { ApiV3Service } from 'core-app/core/apiv3/api-v3.service';
 import { CustomActionResource } from 'core-app/features/hal/resources/custom-action-resource';
 import { UntilDestroyedMixin } from 'core-app/shared/helpers/angular/until-destroyed.mixin';
+import { trackByHref } from 'core-app/shared/helpers/angular/tracking-functions';
 
 @Component({
   selector: 'wp-custom-actions',
@@ -42,10 +43,14 @@ import { UntilDestroyedMixin } from 'core-app/shared/helpers/angular/until-destr
 export class WpCustomActionsComponent extends UntilDestroyedMixin implements OnInit {
   @Input() workPackage:WorkPackageResource;
 
+  trackByHref = trackByHref;
+
   actions:CustomActionResource[] = [];
 
-  constructor(readonly apiV3Service:ApiV3Service,
-    readonly cdRef:ChangeDetectorRef) {
+  constructor(
+    readonly apiV3Service:ApiV3Service,
+    readonly cdRef:ChangeDetectorRef,
+  ) {
     super();
   }
 
@@ -59,7 +64,7 @@ export class WpCustomActionsComponent extends UntilDestroyedMixin implements OnI
         this.untilDestroyed(),
       )
       .subscribe((wp) => {
-        this.actions = wp.customActions ? [...wp.customActions] : [];
+        this.actions = wp.customActions as CustomActionResource[];
         this.cdRef.detectChanges();
       });
   }