Modal sobre modal mdnb

gistfile1.js

require(['modules/banners/views/listaView'], function (EmailModal) {
    var view = new EmailModal({model: new Backbone.Model()}),
        modalOptions = {
            removeExtraPannel: true,
            showFooter: true,
            title: 'Responder e-mail',
            modalSize: 'full', //  renderiza .modal-lg
            onRenderCallback: function () {
                console.log('Execuntando o método onRenderCallback');
            }
        };
    app.commands.execute("app:show:modalView", view, modalOptions);
});