Resolve "Allow using time slot numbers in long term absences dialog (instead of datetimes)"

Closes #300 (closed)

aleksis/apps/alsijil/frontend/components/coursebook/absences/AbsenceCreationForm.vue

@@ -112,9 +112,9 @@ export default {
     allPersons: persons,
     periodsByDay: {
       query: periodsByDay,
-      result({ data: { periodsByDay } }) {
         this.handleStartDate(this.start);
         this.handleEndDate(this.end);
+      result(_) {
       },
     },
   },