[TIMOB-6580] iOS: backgroundSelectedImage does not work on Button component

// this sets the background color of the master UIView (when there are no windows/tab groups on it)
Titanium.UI.setBackgroundColor('#000');


var win1 = Titanium.UI.createWindow({  
    title:'Tab 1',
    backgroundColor:'#fff'
});


var button = Ti.UI.createButton({
	backgroundImage: 'call.png',
	backgroundSelectedImage: 'settings.png',
	color: '#fff',
	 height: 30, width: 100, top: 45, left: 5, 
});



win1.add(button);
win1.open();