Refresh the view model when a new highlight is saved

When a new highlight is saved, updateViewModel() was called
immediately after making the request to the server to save
the highlight, but not after the response from the server
is received, when additional properties such as the last-updated
timestamp for the highlight, will have been set.

h/static/scripts/directive/annotation.js

@@ -417,6 +417,7 @@ function AnnotationController(
       domainModel.permissions = permissions.private();
       domainModel.$create().then(function() {
         $rootScope.$emit('annotationCreated', domainModel);
+        updateViewModel($scope, time, domainModel, vm, permissions);
       });
     } else {
       // User isn't logged in, save to drafts.