fix(admin-ui): Fix adding country to zone dialog

Fixes #3212

packages/admin-ui/src/lib/settings/src/components/add-country-to-zone-dialog/add-country-to-zone-dialog.component.html

@@ -1,6 +1,7 @@
 <ng-template vdrDialogTitle>{{ 'settings.add-countries-to-zone' | translate: { zoneName: zoneName } }}</ng-template>
 
 <vdr-zone-member-list
+    locationId="zone-members-list"
     [members]="availableCountries$ | async"
     [selectedMemberIds]="selectedMemberIds"
     (selectionChange)="selectedMemberIds = $event"