Fixed logic checking value of this.hasDraftVersion$

Author: jr-rk

src/app/item-page/simple/field-components/clarin-item-versions-field/clarin-item-versions-field.component.ts

@@ -90,7 +90,7 @@ export class ClarinItemVersionsFieldComponent extends ItemVersionsComponent impl
    */
   getVersionWorkspaceId(versionItem: Observable<any>): Observable<string | undefined> {
     return combineLatest([
-      this.hasDraftVersion$ || of(false),
+      this.hasDraftVersion$ ?? of(false),
       of(versionItem)
     ]).pipe(
       switchMap(([hasDraftVersion, item]) =>