[TIMOB-13528] iOS: Regression in behaviour with custom views on {right,left} NavButton for iOS

Titanium.UI.setBackgroundColor('#000');

var nav = Ti.UI.createView({
	width: Ti.UI.SIZE,
	layout: 'horizontal'
});

var btn = Ti.UI.createButton({
	width: 40,
	left: 2,
	right: 2,
	image: 'KS_nav_views.png'
});

var toggle = true;

btn.addEventListener('click', function () {
	toggle = !toggle;
	btn.image = toggle ? 'KS_nav_views.png' : 'KS_nav_ui.png';
});

nav.add(btn);

var window = Ti.UI.createWindow({
	title: 'Example',
	rightNavButton: nav,
	navBarHidden: false,
	backgroundColor: 'white',
	modal: true
});

window.open();