status / assignee updates

apps/red-ui/src/app/modules/dossier/dialogs/assign-reviewer-approver-dialog/assign-reviewer-approver-dialog.component.ts

@@ -100,6 +100,14 @@ export class AssignReviewerApproverDialogComponent {
     async save() {
         this._loadingService.start();
         try {
+            if (!this.selectedUser) {
+                await this._filesService
+                    .setUnassigned(
+                        this.data.files.map(f => f.fileId),
+                        this.dossier.id,
+                    )
+                    .toPromise();
+            }
             if (this.data.mode === 'reviewer') {
                 await this._filesService
                     .setReviewerFor(