Fix pass through of group ids in custom event dialog

aleksis/core/frontend/components/calendar_feeds/details/CustomDetails.vue

@@ -66,9 +66,7 @@ export default {
       return {
         id: this.selectedEvent.meta.id,
         persons: this.selectedEvent.meta.persons.map((p) => p.id.toString()),
-        groups: this.selectedEvent.meta.groups.map((room) =>
-          room.groups.toString()
-        ),
+        groups: this.selectedEvent.meta.groups.map((g) => g.id.toString()),
         title: this.selectedEvent.name,
         description: this.selectedEvent.meta.description,
         location: this.selectedEvent.location,