updated jshint to 2.1.3

single quotes

UI/Settings/SettingsModel.js

@@ -1,9 +1,9 @@
-"use strict";
+'use strict';
 define(['app',
     'Settings/SettingsModelBase'], function (App, SettingsModelBase) {
     return SettingsModelBase.extend({
         url           : App.Constants.ApiRoot + '/settings',
         successMessage: 'Settings saved',
-        errorMessage  : "Failed to save settings"
+        errorMessage  : 'Failed to save settings'
     });
 });