Revert "Remove the file tree, as Sandbox does not permit"
This reverts commit 35400e1320.
This also changes how the File Tree choosing works.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
Added File Tree contextual menu (Add to Playlist, Show in Finder, etc.).
File Tree and additions to play list now use Finder sort order.
File Tree Root can be set via its popup menu or drag and drop from File Tree.
Alias names are now shown in File Tree (aliases are still resolved).
Added option to skip reading of cue sheets when adding a folder to play list.
