[TIMOB-5768] iOS: Black bar added over navBar when rotating back from full screen

<orientations device="iphone">
     <orientation>Ti.UI.PORTRAIT</orientation>
</orientations>

// this sets the background color of the master UIView (when there are no windows/tab groups on it)
Titanium.UI.setBackgroundColor('#000');

// create tab group
var tabGroup = Titanium.UI.createTabGroup();


//
// create base UI tab and root window
//
var win1 = Titanium.UI.createWindow({  
    title:'Tab 1',
    backgroundColor:'#fff',
    navBarHidden: false,
    tabBarHidden: true
});
var tab1 = Titanium.UI.createTab({  
    icon:'KS_nav_views.png',
    title:'Tab 1',
    window:win1
});

var b1 = Titanium.UI.createButton({
	title:'Win 2',
	height:40,
	width:200,
	top:30
});

win1.add(b1);

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

tabGroup.addTab(tab1);  


// open tab group
tabGroup.open();