[TIMOB-8019] MobileWeb : Window - Calling open on an already opened window causes the app to become non-responsive

var _window = Titanium.UI.createWindow({
			title : 'test',
			backgroundColor : 'white'
		});

var button = Ti.UI.createButton({
			title : 'Press me'
		});
		button.addEventListener('click', function() {
			var button2 = Ti.UI.createButton({
				title : 'close'
			});
			var win = Ti.UI.createWindow({
				modal : true,
				backgroundColor : '#c96'
			});
			button2.addEventListener('click', function() {
				win.close();
			});
			win.add(button2);
			win.open();

			win.open();

		});
		_window.add(button);
_window.open();