Move ChangeNotifier from Lib to Repo

Change-Id: Id3e10eb7826e31b342174248160ba8832c1e54db
Localisation updates from https://translatewiki.net.

Change-Id: I46f00121dc08e05f82e748518a47e5f81a66ce49
Merge "Move ChangeNotifier from Lib to Repo"
Merge "Localisation updates from https://translatewiki.net."