Whole Album Mode

Instead of playing individual songs, it would sometimes be nice to play entire albums. This would work the same as regular mode, except whenever a new song is encountered, it would be grouped along with any other songs in its directory, and sorted in track order.

Exact details are yet to be determined. For example, if an album has eight songs but only three are in the song list, should the entire album be played, or just those three? If they're not already in order, should the other songs be moved in the list to group them together, or should it play the entire album each time it encounters a song from the album in the song list? Should it automatically ignore ratings in album mode, or should it be able to skip songs?