[TIMOB-15492] iOS7: incorrect title bar height when switching fullscreen to regular tab

var win1 = Titanium.UI.createWindow({
	navBarHidden : true, // the bug happens with or without navbar
	fullscreen : true
});

var win2 = Titanium.UI.createWindow({
	title: 'Window 2'
});

var tab1 = Titanium.UI.createTab({
	title : 'Tab 1',
	window : win1
});

var tab2 = Titanium.UI.createTab({
	title : 'Tab 2',
	window : win2
});

var tabGroup = Ti.UI.createTabGroup();

tabGroup.addTab(tab1);
tabGroup.addTab(tab2);
tabGroup.open();