Upstream developer made several releases in a relatively short time frame:
Versions 17 and 18 were never actually published, or have been removed.
Version 19 added compatibility with Ubuntu's modified, Unity-like GNOME Shell session, and a new setting allowing users to have Do Not Disturb mode enabled by default at login.
Version 20 added translations for this new setting.
Logout Required
After installing this update it is required that you logout of
your current user session and log back in to ensure the changes
supplied by this update are applied properly.
This update has been submitted for testing by terrycloth.
This update has been pushed to testing.
This update has reached 7 days in testing and can be pushed to stable now if the maintainer wishes
This update has been submitted for batched by terrycloth.
This update has been submitted for stable by terrycloth.
This update has been pushed to stable.