Resolve "Frontend for Models"

Closes #1 (closed)

aleksis/apps/lesrooster/frontend/components/Break.vue

 <script>
-import { breakSlots, createBreakSlot, deleteBreakSlot, updateBreakSlots, } from "./break.graphql";
+import {
+  breakSlots,
+  createBreakSlot,
+  deleteBreakSlot,
+  deleteBreakSlots,
+  updateBreakSlots,
+} from "./break.graphql";
 import LesroosterSlot from "./LesroosterSlot.vue";
 
 export default {
@@ -13,6 +19,7 @@ export default {
       gqlCreateMutation: createBreakSlot,
       gqlPatchMutation: updateBreakSlots,
       gqlDeleteMutation: deleteBreakSlot,
+      gqlDeleteMultipleMutation: deleteBreakSlots,
     };
   },
 };