[TIMOB-9488] MobileWeb: Focus event in tabgroup not being fired

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

// create tab group
var tabGroup = Titanium.UI.createTabGroup();
var  win = Titanium.UI.createWindow({
                    backgroundColor:'white',
                    title:'window',
                    barColor:'#ff7b01',
                    top:0,
                    navBarHidden:false
                });
                
/* win.addEventListener('focus',function(){
	alert('focus');
}); */
    var tab1 = Titanium.UI.createTab({  
    icon:'KS_nav_views.png',
    title:'Tab 1',
    window:win
});       
 var tab2 = Titanium.UI.createTab({  
    icon:'KS_nav_views.png',
    title:'Tab 2',
    window:win
});          
                var titleImage = Ti.UI.createView({
							width:94,
							height:24,
							backgroundImage:'/images/header/ing_logo_header.png',
						});
						win.titleControl = titleImage;
						
//win.open();
tabGroup.addTab(tab1);  
tabGroup.addTab(tab2);
tabGroup.open();
tabGroup.addEventListener('focus',function(){
	alert('focus tabs fired')
});
tabGroup.addEventListener('click',function(){
	alert('click fired')
});