[TIMOB-14025] Mobile Web: Child window views appear on top of alert dialogs if dialog is shown before window open

var self = Ti.UI.createWindow();

var mainArea = Ti.UI.createView({
backgroundColor : 'red',
height : Ti.UI.SIZE,
width : Ti.UI.SIZE
});
var message = Ti.UI.createLabel({
font : {
    fontSize : '14dp'
},
height : Ti.UI.SIZE,
color : '#4b4b4b',
width : Ti.UI.SIZE,
text : 'Test text here to test things out because we need to test'
});

mainArea.add(message);
self.add(mainArea);

var alertDialog = Ti.UI.createAlertDialog({
title : 'Error',
message : "Testing alert",
buttonNames : ['OK']
});
alertDialog.show();
self.open();