uas-platform/frontend/uas-web/app/Application.js

Ext.define('uas.Application', {
    extend: 'Ext.app.Application',

    name: 'uas',

    requires: [
        'uas.*'
    ],

    mainView: {
        xtype: 'viewport',
        layout: 'fit',
        controller: 'app'
    }
});