Please add skybox filename option

[DarlingSugarComb]

In the Lighting tab, where you choose the Environment Skybox, there is a small window with thumbnails of selectable cubemaps. If possible, I would like to see filenames either shown when I select a cubemap or written on top of the thumbnail.

Expected Behavior

I'd expect some kind of identification of the filename of a cubemap somewhere. I hope I'm not being unreasonable as I have no idea the difficulties of making it happen.

Current Behavior

Right now, all I see are thumbnails of the cubemap without knowing the filename. It makes it hard to know what cubemap files I am using.... I have a lot of them.

Used Graphics Version

HS2 version 0.3.3