Support re-scanning files from disk

[Aberro]

This shouldn't be that hard, is it? And yet, with heavily modded instances, this could save hundreds of hours for users, who want to try different TUFX configurations.

[JonnyOThan]

I've added support for re-loading the profile from the .cfg file. But it would be nice if TUFX could load profiles from previously unknown cfg files (i.e. you install a profile while the game was already running).

This isn't as easy as it sounds - a tufx profile could exist in any folder, so it would need to load every cfg file from the gamedata folder to look for new ones. It might be reasonable to restrict the search to TUFX/Profiles, but there are TUFX profiles available on CKAN that don't install to that location.