[TIMOB-11219] iOS: Black bar starts appearing below navBar when orientation changed between opening and closing of a window.

This is a regression. It is working fine with 2.1.2GA on iOS 6. This is only occurring on iOS 6 ipad. Working fine on iOS 5.1 ipad with 2.1.3.v20120928203111. Steps to reproduce: 1. Use the code below -

Titanium.UI.setBackgroundColor('#000');

var tabGroup = Titanium.UI.createTabGroup();

var win1 = Titanium.UI.createWindow({  
    title:'Tab 1',
    backgroundColor:'#fff',
    navBarHidden: false,
});
var tab1 = Titanium.UI.createTab({  
    icon:'KS_nav_views.png',
    title:'Tab 1',
    window:win1
});

var b1 = Titanium.UI.createButton({
	title:'Win 2',
});

win1.add(b1);

b1.addEventListener('click', function(e)
{
    var w = Titanium.UI.createWindow({
	fullscreen:true,
	barColor:'#111',
	orientationModes:[Titanium.UI.LANDSCAPE_LEFT]
    });
    tab1.open(w);
});

tabGroup.addTab(tab1);  
tabGroup.open();

2. Run the app and rotate device to landscape mode. 3. Click the button 'Win 2' 4. Rotate the device to portrait mode. 5. Click the nav button 'Tab 1'. Expected result: 2. A tabgroup with a button 'win 2' should be displayed. Window should be rotated to landscape mode. 3. A new black window should get opened in the tab. 4. The black window should remain in landscape mode. 5. The black window should get closed and older white window should be displayed with no black bar below navbar. Actual result: 2. A tabgroup with a button 'win 2' gets displayed. Window gets rotated to landscape mode. 3. A new black window gets opened in the tab. 4. The black window remains in landscape mode. 5. The black window gets closed and older white window gets displayed with a black bar below navbar. This black bar below navbar should not get displayed. Snapshots attached.