Comment 2 for bug 1229681

The issue here seems to be that unpinning an app pushes a zeitgeist event with application scheme and full path to the desktop file. If a desktop file is present in the standard XDG directories, the full path should be omitted and only desktop id (as per fdo menu spec) should be used - ie instead of "application:///usr/share/applications/foo/bar.desktop", "application://foo-bar.desktop" should be used. This will ensure that the event is correctly grouped with all the other events that we get from elsewhere about the application.