(fix) Partial fix for md-contact-chips

Those fixes resolve the JavaScript errors, but the behavior is wrong;
the displayed results are delayed with respect to the search string.
md-contact-chips is expected to change (for the best) soon.

UI/WebServerResources/js/Preferences/PreferencesController.js

@@ -146,11 +146,8 @@
     }
 
     function userFilter($query) {
-      var deferred = $q.defer();
-      User.$filter($query).then(function(results) {
-        deferred.resolve(results)
-      });
-      return deferred.promise;
+      User.$filter($query);
+      return User.$users;
     }
     
     function save() {