[TIMOB-6889] iOS: UI - when tabGroup tab first window has tabbarHidden enabled, subsequent window tabGroup bar also hidden

Ti.UI.setBackgroundColor('black');
var tabGroup = Ti.UI.createTabGroup();

var win1 = Ti.UI.createWindow({
    tabBarHidden:true,
    title:'Window 1',
    backgroundColor:'white',
});
var tab1 = Ti.UI.createTab({
    title:'Tab 1',
    window:win1
});

var label1 = Ti.UI.createLabel({
    textAlign:'center',
    text:'I am win1'
});
win1.add(label1);

var win2 = Ti.UI.createWindow({
    tabbarHidden:false, // should cause tabgroup bar to be shown  
    title:'Window 2',
    backgroundColor:'white'
});

var label2 = Ti.UI.createLabel({
    textAlign:'center',
    text:'win2 - tabgroup bar should be visible but its not'
});
win2.add(label2);

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

label1.addEventListener('click', function() {
//	tab1.open(win2);
	tabGroup.activeTab.open(win2);
});