[AC-2831] Refresh button icon not vertically centered

Creating a systemButton in the nav bar, the refresh icon isn't properly vertically centered. The Head of the arrow shouldn't touch the midline of the button as show with the overlay gloss effect. I've attached an image of the icon. I've also noticed this with other icons I've used in a button, but this was pretty noticeable in a systemButton.

var refreshButton = Ti.UI.createButton({
   systemButton:Titanium.UI.iPhone.SystemButton.REFRESH,
});
	
win.rightNavButton = refreshButton; 

I've attached an image which compares the Titanium version versus what it should look like.