feature proposal: Show the directory tree in the video picker

[hhenry807]

Basically an integrated file browser as an alternative to the flat list. May be possible to build it on top of QFileSystemModel

This would allow users to organize their media using folders, which would be great for me personally.

I'm considering implementing this myself, but I wanted to open an issue first to keep you in the loop

[jcfain]

I started doing this at one point but it was more work than I wanted to take on. I just finished the filter and sort and was worn out at that point.