Resolve "Loading animation for timetable object select on left side of timetables"

Closes #263 (closed)

aleksis/apps/chronos/frontend/components/SelectTimetable.vue

@@ -138,6 +138,14 @@ export default {
           </div>
         </div>
       </template>
+      <template #no-data>
+        <div class="d-flex flex-column align-center justify-center">
+          <mascot type="ready_for_items" width="33%" min-width="250px" />
+          <div class="mb-2">
+            {{ $t("chronos.timetable.no_timetables_in_term") }}
+          </div>
+        </div>
+      </template>
     </v-data-iterator>
   </div>
 </template>