aa733b5e53
Rework the count system in Source, to distinguish between the normal notification count and the count of unseen/unacknowledged notification. (A notification is considered unacknowledged until shown, as a banner or inside the summary box pointer). Includes some code cleanups and a test for multiple notifications in the same source. https://bugzilla.gnome.org/show_bug.cgi?id=681143