[TIMOB-9738] MobileWeb: 'focus' tabGroup event it's triggered when opening a child window when using an activity indicator

var tg = Ti.UI.createTabGroup();
Ti.UI.backgroundColor = 'white';

var win1 = Ti.UI.createWindow({
  backgroundColor: 'blue'
});
var clikButton = Titanium.UI.createButton({
				title:'Child window',
				backgroundImage : 'none',
				backgroundColor: 'black',
				top : 15,
				height:41,
				font: {
					fontFamily:'Helvetica Neue',
					fontWeight:'bold',
					fontSize:19
				},
				color: '#FFFFFF'
			});
win1.add(clikButton);

var win2 = Ti.UI.createWindow({
  backgroundColor: 'yellow',
  fullscreen: false
});

 var activityIndicator = Titanium.UI.createActivityIndicator({
                    height:'100%',
                    width:'100%',
                    message:'Loading...',
                    font:{size:8},
                    color:'white',
                    style:''
                });
        var activityView = Ti.UI.createView({
                    zIndex:10,
                    height:'20%',
                    width:'31.25%',
                    borderRadius:10,
                    backgroundColor:'black'
                });
        var activityWindow = Ti.UI.createWindow({
        			width:'100%',
        			height:'100%'
        		});
        activityView.add(activityIndicator);
        activityWindow.add(activityView);

clikButton.addEventListener('click', function () {
  activityIndicator.show();
  activityWindow.open();
  // do some work that takes 1 second
  setTimeout(function(){
    tab1.open(win2);
    activityIndicator.hide();
      activityWindow.close();
  }, 1000);
});


var tab1 = Ti.UI.createTab({
	title: 'tab1',
	window:win1
});
tg.addTab(tab1);

tab1.addEventListener('focus',function(){
	var alertDialogue = Ti.UI.createAlertDialog({
		title:'alert'
	});
	alertDialogue.show();
});

tg.open();