Reuse draggedTeachers/Rooms in overlayLessons

aleksis/apps/lesrooster/frontend/components/timetable_management/TimetableManagement.vue

@@ -216,9 +216,8 @@ export default defineComponent({
       variables() {
         return {
           timeGrid: this.internalTimeGrid.id,
-          rooms: this.draggedItem?.data.rooms?.map((room) => room.id) || [],
-          teachers:
-            this.draggedItem?.data.teachers?.map((teacher) => teacher.id) || [],
+          rooms: this.draggedRooms,
+          teachers: this.draggedTeachers,
         };
       },
       skip() {