Why fittable does not work

App.js

enyo.kind({
	name: "App",
	kind: "FittableRows",
	components:[
		{kind: "Signals", ondeviceready: "deviceReady"},
		{kind: "onyx.Toolbar", classes: "center", content: "Anuários do Consultor Jurídico"},
		{kind: "enyo.Scroller", fit: true, components: [
            {name: "busy", classes: "center", showing: false, components: [
                {
                    kind: "onyx.Spinner",
                    classes: "onyx-light"
                },
                {
                    name: "busyMessage",
                    content: "Carregando..."
                },
                {
                    name: "progress",
                    kind: "onyx.ProgressButton",
                    onCancel: "cancelDownload",
                    showing: false
                }
            ]},
			{name: "catalog", classes: "nice-padding", allowHtml: true}
		]},
		{kind: "onyx.Toolbar", components: [
			{kind: "onyx.Button", content: "Recarregar", ontap: "helloWorldTap"},
            {kind: "onyx.Button", content: "Baixar 1 revista", ontap: "baixar"},
            {kind: "onyx.Button", content: "Abrir revista", ontap: "abrirPDF"}
		]}
	],