Add "Is not" condition for Mood, Occasion, etc.

[rycher]

Hi,

When making auto-playlists and discriminating on Occasion or similar field, the only conditions available are is, is known and is unknown. It would be useful to also have "is not".

Thanks!

Tanguy

[Lowlander]

Already requested: http://www.ventismedia.com/mantis/view.php?id=6360

[rycher]

Thanks!