[TIMOB-13917] Android: Slider thumb image is masked

When I set thumb image property in the slider, half of the thumb image disappear after I moved it to the position 0 or 100. This bug is only on Android, on iOS it is working properly. *I can use in slider properties min/max + minRange/maxRange for a workaround ,but then I have to calculate things in the listener and if is there a lot of calculations whole slider is very slow... So is nice to have fixed slider ;) *app.js*

 
var win = Ti.UI.createWindow({
	backgroundColor : "white"
});

var slider = Ti.UI.createSlider({
	width : '90%',
	thumbImage : "KS_nav_ui.png"
});

win.add(slider);
win.open();