Proposal: Last.fm UI Changes

[Nikolaj Hald Nielsen]

>  In that case, that system will need to get fixed so that they *can* show up
> in the toolbar when playing non-last.fm tracks :) i'm certain this is not the
> only time when such functionality would be brilliant when using non-plugin
> supplied tracks.

The GlobalCollectionAction system exists to do just that, it is
currently only used for adding the "Play similar Artists from Last.fm"
to all artists, regardless of which collection they are from.

- Nikolaj