Show more of the file path of downloaded files

[JL102]

Improved the "Available in" part of the list such that it displays more of the file path, instead of just the containing folder. To give it a bit of extra room, I increased the max width of the label_1, since after a file is downloaded, the label_2 is usually much shorter.

[bpozdena]

This would probably be a cleaner using Pathlib, but it seems to work well :-).

Thanks for the work @JL102 !