[TIMOB-15078] iOS7: Modal Window is not closing correctly

var win1 = Ti.UI.createWindow({
	backgroundColor: "#FF00FF",
	title: "Window 1"
});

var navWindow = Ti.UI.iOS.createNavigationWindow({
	window: win1
});

navWindow.open();

win1.addEventListener("focus", function() {
	alert("win1 focused");
});

win1.addEventListener("click", function() {
	var buttonClose = Ti.UI.createButton({
		title: "Close"
	});

	var win2 = Ti.UI.createWindow({
		leftNavButton: buttonClose,
		backgroundColor: "#FFFF00",
		title: "Window 2"
	});
	
	var navWindow2 = Ti.UI.iOS.createNavigationWindow({
		modal: true,
		window: win2
	});

	navWindow2.open();
	
	buttonClose.addEventListener("click", function() {
		navWindow2.close();
	});
});