[AC-92] Window Focus event Fire some times fire and some times it doesn't. Even app get hangs up and next window is not opening.

   var win1 = Titanium.UI.createWindow({
   	backgroundColor : 'red',
   	title : 'Red Window',
   });
   
   var nav = require('nav').create(win1);
   
   var button = Titanium.UI.createButton({
   	title : 'Open Blue Window'
   });
   
   button.addEventListener('click', function() {
   	dialog.show();
   });
   
   var dialog = Ti.UI.createAlertDialog({
   	cancel : 1,
   	buttonNames : ['Confirm', 'Cancel'],
   	message : 'Would you like to open window 2?',
   	title : 'Window Option'
   });
   dialog.addEventListener('click', function(e) {
   	if (e.index == 0) {
   
   		var WindowTwo = require('WindowTwo');
   		var myWindowTwo = new WindowTwo();
   
   		nav.openWindow(myWindowTwo, {
   			animated : true
   		});
   	}
   
   });
   
   win1.add(button);
   
   var button1 = Titanium.UI.createButton({
   	title : 'Open Forth window',
   });
   
   button1.addEventListener('click', function() {
   	var WindowFour = require('WindowFour');
   	var myWindowFour = new WindowFour();
   	nav.openWindow(myWindowFour, {
   		animated : true
   	});
   });
   
   win1.leftNavButton = button1;
   win1.addEventListener("focus", function(e) {
   
   	Ti.API.info("Focus On First Window");
   });
   
   nav.open(); 
   

   var WindowTwo = function() {
   	
   	var nav = require('nav').getNav();
   	
   	var win2 = Titanium.UI.createWindow({
   		backgroundColor : 'blue',
   		title : 'Blue Window',
   		
   	});
   
   	var button1 = Titanium.UI.createButton({
   		title : 'Open Third Window',
   		top : 20,
   		height : 30
   	});
   
   	button1.addEventListener('click', function() {
   		var WindowThree = require('WindowThree');
       	var myWindowThree = new WindowThree();
   		nav.openWindow(myWindowThree, {
   			animated : true
   		});
   	});
   
   	win2.rightNavButton = button1;
   
   	var button = Titanium.UI.createButton({
   		title : 'Close Blue Window',
   	});
   	
   	button.addEventListener('click', function() {
   		alert("closing window 2");
   		nav.closeWindow(win2);
   	});
   
   	win2.add(button);
   
   	win2.addEventListener("focus", function(e) {
   		Ti.API.info("Focus On Second Window");
   	});
   
   	return win2;
   
   };
   
   module.exports = WindowTwo; 
   

   var WindowThree = function(navWin) {
   	var nav = require('nav').getNav();
   	
   	var win3 = Titanium.UI.createWindow({
   		backgroundColor : 'gray',
   		title : 'Gray Window',
   		
   	});
   	
   	var button1 = Titanium.UI.createButton({
   		title : 'Open Forth Window',
   	});
   
   	button1.addEventListener('click', function() {
   		var WindowFour = require('WindowFour');
       	var myWindowFour = new WindowFour();
   		nav.openWindow(myWindowFour, {
   			animated : true
   		});
   	});
   	
   	win3.rightNavButton = button1;
   
   	var button = Titanium.UI.createButton({
   		title : 'Close Gray Window'
   	});
   	
   	button.addEventListener('click', function() {
   		alert("closing window 3");
   		nav.closeWindow(win3);
   	});
   
   	win3.add(button);
   
   	win3.addEventListener("focus", function(e) {
   		Ti.API.info("Focus On Third Window");
   	});
   
   	return win3;
   
   };
   
   module.exports = WindowThree; 
   

   var WindowFour = function(navWin) {
   	var nav = require('nav').getNav();
   	
   	var win4 = Titanium.UI.createWindow({
   		backgroundColor : 'pink',
   		title : 'Pink Window',
   		
   	});
   
   	var button = Titanium.UI.createButton({
   		title : 'Close Pink Window'
   	});
   	button.addEventListener('click', function() {
   		alert("closing window 4");
   		nav.closeWindow(win4);
   	});
   
   	win4.add(button);
   
   	win4.addEventListener("focus", function(e) {
   		Ti.API.info("Focus On Forth Window");
   	});
   
   	return win4;
   
   };
   
   module.exports = WindowFour; 
   

   var nav;
    
   function create(win1) {
       nav = Ti.UI.iOS.createNavigationWindow({
           window: win1
       });
       return nav;
   }
   function getNav() {
       return nav;
   }
    
   exports.create = create;
   exports.getNav = getNav;