You guessed it, these things are not done yet (nor is this list done, I'll
probably add even more stuff into FlexPlaylist)

TODO:
- Dockmode, user chooses the window to dock to
- Get artists to create an add_files icon that looks like the delete icon but
  with a green plus instead of a red X.
- Undo and Redo
- Do something sane if the user renames the file in the properties dialog, OR
  figure out how to disable renaming when the dialog is opened.

DONE:
- Use alternating colors in listview (as seen in kmail and other
  kde-applications)
- Configurable keyboard-shortcuts for most actions
- Properties, Delete, and Play This Next should be disabled if nothing is selected
- Drag and drop should open a menu similar to Konqueror DnD with
    Insert here
    Add to end of playlist
    Cancel
- New and Open should confirm clearing playlist if modified
- New action should not open an "Open File" dialog; it should just create an
  empty playlist, consistent with other document-oriented applications.
- Add Files action should list supported playlist types in addition to media
  types in file open dialog
- Add right-click context menu for playlist items
    Play [done]
    Play This Next [done]
    ----
    Delete [done]
    ----
    Properties [done]
- Fix: If player is stopped, deleting current item starts playing next item
- add something like the jump dialog found in xmms
- Autoresize columns, time takes as much space as needed, title column takes the rest
- Action to purge non-existing/removed files from playlist
