[TIMOB-6994] iOS: UI - AlertDialog needs to be displayed after locking & unlocking the phone

    // this sets the background color of the master UIView (when there are no windows/tab groups on it)
    Titanium.UI.setBackgroundColor('#000');
     
    var tabGroup = Titanium.UI.createTabGroup();
     
    var win1 = Titanium.UI.createWindow({  
        title:'Tab 1',
        backgroundColor:'#fff'
    });
    var tab1 = Titanium.UI.createTab({  
        icon:'KS_nav_views.png',
        title:'Tab 1',
        window:win1
    });
    var button1 = Ti.UI.createButton({
    	title: 'normal alert',
    	top: 30,
    	height:Ti.UI.SIZE,
    	width:Ti.UI.SIZE
    });
    button1.addEventListener('click',function(){
    
    	var alertDialog = Titanium.UI.createAlertDialog({
    	    title : "Alert Dialog",
    	    message : "I will go away if you background the app. ;(",
    	    buttonNames : ["Yes", "No"],
    	});
    	alertDialog.show();
    });
    var button2 = Ti.UI.createButton({
    	title: 'persistant alert',
    	top: 80,
    	height:Ti.UI.SIZE,
    	width:Ti.UI.SIZE
    });
    button2.addEventListener('click',function(){
    
    	var alertDialog = Titanium.UI.createAlertDialog({
    	    title : "Alert Dialog",
    	    message : "This Alert Should be persistant, I will not go away unless you cancel me!",
    	    buttonNames : ["Yes", "No"],
    		persistent : true,
    	});
    	alertDialog.show();
    });
    var label = Ti.UI.createLabel({
    	text:'Perfrom the following test.\n1.Click on normal alert.\n2.Without Cancelling the Alert background the app.\n3.On reopening the alert should be hidden.\n4.Click on persistant Alert\n5.Follow step 2. and when you reopen the app the alert should be run.\n6.If the second alert dialog still shows then the test is PASSED.',
    	height:Ti.UI.SIZE,
    	width:Ti.UI.SIZE,
    	bottom: 10
    })     
    win1.add(label);
    win1.add(button1);
    win1.add(button2);
    tabGroup.addTab(tab1);  
     
    tabGroup.open();