Add torrent dialog removes directory from file tree

[Bro]

When adding a torrent that contains one directory with one file inside, the directory is not included in the tree view. This has been the behavior since the dawn of time, presumable due to the mistaken beleif that the directory was not needed. All other torrent clients include the directory even if there is only one file inside

[Calum]

I do hope that no-one was relying on this and breaks their workflow...

I think this is a sane fix however and I checked that libtorrent also does this:

For multi-file torrents, this is also the name of the root directory all the files are stored in.