[TIMOB-11766] ActionBar issues with TabGroup

var tabs = Ti.UI.createTabGroup();

var win1 = Ti.UI.createWindow({
	title:"Window 1",
	backgroundColor:'#f00',
});
var tab1 = Ti.UI.createTab({
	title:"Win 1",
	window:win1,
});

tabs.addTab(tab1);

var win2 = Ti.UI.createWindow({
	title:"Window Dos",
	backgroundColor:'#fff',
});
var tab2 = Ti.UI.createTab({
	title:"Win 2",
	window:win2,
});

tabs.addTab(tab2);

tabs.addEventListener('focus', function(e) {
	var actionBar = tabs.getActivity().actionBar; // "activity" is an undocumented Android property for TabGroup
	if (actionBar) {
		actionBar.setDisplayHomeAsUp(true); // works
		actionBar.onHomeIconItemSelected = function() { // works
			alert('actionBar hides for 5 seconds');
			actionBar.hide(); // works
			setTimeout(function(){
				actionBar.show(); // works
			},5000);
		}
//		actionBar.setTitle(e.tab.window.title); // title never appears
		actionBar.setTitle('TEST'); // hard-coded text just to be sure
	}
});

tabs.open();