I know, i am nitpicking, but a look of my library matters. To me at least! Is this a bug appearing only for me or everybody has it like this? Please see the picture.

You can right-click and go to Edit, then Media, but I can't find the source picture to edit the line out of, so I'll just tolerate it unless the GOG programmers fix it.

Not sure if you noticed that, but they actually fixed it. :D

NVM, it's not... My bad, it's still there once you install the game. The line doesn't appear if the game is uninstalled though. That's what confused me.