[Bug 31601] default playlist format when creating new playlists in Serpentine

[Jonathon Conte]

Public bug report changed:
https://launchpad.net/malone/bugs/31601

    - Changed attachments:
        Added: mockup window to replace "Unsupported Format" error message
           http://librarian.launchpad.net/1577161/Screenshot-Choose%20Playlist%20Format.png