Merge pull request #4238 from DSpace/backport-3968-to-dspace-7_x

[Port dspace-7_x] Fix - previously entered qualdrop value field is deleted when adding a new (emtpy) line with the same(!) qualifier and then deleting it

Author: tdonohue

src/app/shared/form/form.component.ts

@@ -316,7 +316,7 @@ export class FormComponent implements OnDestroy, OnInit {
   removeItem($event, arrayContext: DynamicFormArrayModel, index: number): void {
     const formArrayControl = this.formGroup.get(this.formBuilderService.getPath(arrayContext)) as UntypedFormArray;
     const event = this.getEvent($event, arrayContext, index, 'remove');
-    if (this.formBuilderService.isQualdropGroup(event.model as DynamicFormControlModel)) {
+    if (this.formBuilderService.isQualdropGroup(event.model as DynamicFormControlModel) && hasValue((event.model as any)?.value)) {
       // In case of qualdrop value remove event must be dispatched before removing the control from array
       this.removeArrayItem.emit(event);
     }