[AC-2488] iOS 7: Modal Window title does not display

$.index.open();

function openAbout(e) {
	var win = Ti.UI.createWindow({
		title: "About",
		backgroundColor: "white"
	});
	win.open({modal:true});
}

<Alloy>
	<Window>
		<NavigationGroup platform="ios">
            <Window title="Home" backgroundColor="white">
            	<LeftNavButton>
			        <Button onClick="openAbout">About</Button>
			    </LeftNavButton>
            	<RightNavButton>
			        <Button onClick="openSettings">Settings</Button>
			    </RightNavButton>
            </Window>
        </NavigationGroup>
	</Window>
</Alloy>