Instead of using texts to separate system categories, EL will show some icons. I'm not very happy with the arcade icon though. I can't find a suitable icon to represent arcade machines, at least not small icons (16x16 / 32x32). Any help on this is appreciated.
These icons will be used in some key features. For now, icon sizes needed 48x48, 32x32, 24x24, 16x16.