Fix item Icon images

[Skybox_]

For some reason, icons displayed in inventories and module slots don't show the full 32x32 pixel image. It cuts off the edges by about 2 - 4 pixels, which is a bit of a pain for retexturing.

[Nova]

It could have a reason for anti aliasing or anisotropic filtering, but 1 pixel should be enough.

Don't know if this can be fixed, but an alternative would be to just not use the outer pixels.

[bobingabout]

the only time I've noticed this is when you change the image of an icon, and the original image didn't take up the full 32x32. in which case you need to delete your cropcache.