all access to notes and branches is now async so we can lazy load it in the future

src/public/javascripts/dialogs/labels.js

@@ -1,5 +1,6 @@
 import noteDetailService from '../services/note_detail.js';
 import utils from '../services/utils.js';
+import server from '../services/server.js';
 
 const $showDialogButton = $(".show-labels-button");
 const $dialog = $("#labels-dialog");