[Feature Request]: Two Playlists

A 3 pane view of decibel:
     Left Filebrowser
     Middle: Playlist 1
     Right: Playlist 2
With Drag'n'Drop support between the two Playlists,

would make a wonderfull tool for building playlists, so you could pick out the most liked tracks from one album, and put them over to the "most liked"(Right) playlists, open the next album in the "temp" (Middle) playlists an go on...

I would love to see this feature, but Decibel is the best gtk tool for playing music anyways, so implement this feature or don't, I'll still use Decibel only...