Release v3.16.2-beta.4 (#1779)

Improvements for all users:

• We found out that if you encountered a network timeout during the release
  availability check, we would stop alerting you whenever a new release is
  available unless you'd restart the app.
  We're now making sure that each successful availability check (we're running
  a check every 24 hours) we'll offer you to install any update.
• In case you encounter an error such as a synchronization error, we're now
  making sure you'll get notified only once and not every time you open the
  application window.
• If you look at the Settings application on your Cozy, you will list is
  Connected Devices tab. This page lists all clients that were ever connected to
  your Cozy and were not revoked. This page also tells you when each client was
  synchronized for the last time. Unfortunately, the Desktop client was not
  updating this date so you would only see its device name.
  We're now updating this date each time the app reaches the up-to-date status,
  be there any changes to sync or not.

See also known issues.

Happy syncing!