mozilla/butter — pull request #997 by mjschranz (2012-09-20 16:27:14+00:00)
Title: [#2322] Removing a layer now doesn't leave any trackevents still displaying

https://webmademovies.lighthouseapp.com/projects/65733/tickets/2322-deleting-a-layer-doesnt-remove-the-internal-references-to-track-events