[TIMOB-8464] iOS: Opening Modal Window with Flip Transition doesn't work correctly on iOS 5

Issue

Opening a modal window with modalTransitionStyle:Ti.UI.iPhone.MODAL_TRANSITION_STYLE_FLIP_HORIZONTAL produces a buggy appearance since iOS 5. On iOS 4 it worked fine. Also visible in Kitchen Sink.

Steps to reproduce

1. Throw code below to an app.js 2. Run configurations, select Run As > Run configurations ... > iOS SDK 4.3 3. Click the button, click the window 4. Run steps 1 to 3 now under iOS SDK 5

Expected behavior

iOS 4.3 transition works fine

Unexpected behavior

Notice how in iOS 5 transition has a visual glitch

Repro sequence

var win = Ti.UI.createWindow();

var btn = Ti.UI.createButton({
	title : 'click me',
});

btn.addEventListener('click', function() {

	var modalWin = Ti.UI.createWindow({
		backgroundColor : '#ff0000'
	});

	modalWin.open({
		modal : true,
		modalTransitionStyle : Ti.UI.iPhone.MODAL_TRANSITION_STYLE_FLIP_HORIZONTAL
	});
	
	modalWin.addEventListener('click', function(){
		this.close();
	})
});

win.add(btn);

win.open();