saas-one/frontend/operation-web/app/view/viewport/Viewport.js

Ext.define('saas.view.viewport.Viewport', {
    extend: 'Ext.container.Viewport',

    controller: 'viewport',
    viewModel: 'viewport',

    id: 'rootView',

    layout: {
        type: 'card',
        anchor: '100%'
    }
});