adopted to corrected response format

src/components/Lists.vue

@@ -100,7 +100,9 @@ export default {
         gql
       ).then(data => {
         /* Save the list's id in case it was just created */
-        list.id = data.List.id;
+        if (!list.id) {
+          list.id = data.createList.id;
+        }
       }).catch(e => {
         const errMsg = `Failed to save list: ${e}`;
         console.error(errMsg);