Ghost/ghost/admin/app/controllers/settings/code-injection.js

import Ember from 'ember';
var SettingsCodeInjectionController = Ember.Controller.extend({
    actions: {
        save: function () {
            var self = this;

            return this.get('model').save().then(function (model) {
                self.notifications.closePassive();
                self.notifications.showSuccess('Settings successfully saved.');

                return model;
            }).catch(function (errors) {
                self.notifications.closePassive();
                self.notifications.showErrors(errors);
            });
        }
    }
});

export default SettingsCodeInjectionController;