mozilla/zamboni — pull request #1552 by diox (2013-12-17 14:41:06+00:00)
Title: Manually invalidate CollectionMembership when adding an app (bug 950238)

https://bugzilla.mozilla.org/show_bug.cgi?id=950238

(Yes, the update test fails without this patch - it wasn't before because we weren't using `collection.apps()` or `collection._apps.all()` in between adds)