Release v3.16.2 (#1780)

Improvements for all users:

• In some situations like unsigned Terms of Service, requests to the remote Cozy
  will result in errors and the synchronization will fail. To anticipate those,
  we have a poller that requests from the Cozy required user actions and that
  turns them into alerts that Cozy Desktop will show you. A technical error in
  the poller resulted in failure to schedule polls past the first one and you
  would miss those very precious information unless you would restart the
  application.
  You should now be shown those alerts as early as possible without restarting
  the application thus enabling you to anticipate synchronization errors.
• With version 3.16.1 of the app, we decided to increase the visibility of the
  synchronization activity especially during the upload of large files or the
  preparation of local changes. This made the application's status and icon
  "blink" for some users and would give a bad feeling about its behavior.
  We made some more changes to the status display so you should now see no
  blinking and better delimited activity phases that should better reflect the
  ongoing synchronization.
• We use a local Pouch database to keep track of all documents and their
  metadata. Part of this metadata are the remote identifier of each document on
  the Cozy and its last known revision. Whenever we make a change on a document,
  we fetch its previous version from the local Pouch database so we can access
  its old metadata. When the change happened locally, we pass along to the Cozy
  this old metadata's remote revision so it can validate we're not overwriting a
  document that was changed on the Cozy without our knowledge. It appears we
  made a mistake in the order old revisions are returned to us by Pouch and that
  we were not always fetching previous revision but usually the second known
  revision. This would mean local changes on the document would not get
  propagated to the remote Cozy.
  We fixed this revision selection which should avoid quite a lot of propagation
  issues and further down the road conflicts as well.
• 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.

Improvements for Windows and GNU/Linux users:

• The library we use to watch for changes on the local filesystem, Atom Watcher,
  can sometimes generate events without a document type for deletions. In those
  situations we had decided to force the type to file but this would lead to
  type mismatches when a directory was deleted.
  When the event type is unknown, we're now looking into the local Pouch
  database for an existing document at the deleted path and if one does exist,
  we use its type. If we can't find any existing document, we resort back to
  forcing the type to file as we don't have any mean to detect the actual type
  (i.e. the file or directory does not exist anymore so we can't request stats
  from the filesystem).

Improvements for Windows users:

• We found out that when applying on the local filesystem a file modification
  from the Cozy, a rename event was generated from the file path to itself, thus
  firing an Invalid move error.
  While we have no indications that this would have any impact on your usage,
  we've made sure this event is not generated anymore.
• We introduced in Cozy Desktop v3.13.1 a mechanism to identify files and
  directories with more precision on Windows. This required to modify every
  single document in the local Pouch database to make sure the new identifier
  was saved and could be used (e.g. in movement detection). While this worked
  for most documents, users who had local unsynchronized documents when this
  migration took place, ended up with an unsyncable version of those which could
  not be fixed.
  Fortunately, those versions were not actually saved in the database and we
  could fix the migration itself so those documents will get their precise
  identifier and will be synchronized from now on.

Improvements for GNU/Linux users:

• Since the v3.16.0 and the Electron update to v5, the Chromium sandbox is
  activated by default and since it requires kernel features that are disabled
  by default in Debian issued kernels, users of those kernels could not start
  the application without using the --no-sandbox flag. This would mean either
  launching the app from the command line or modifying the .desktop file used
  as a shortcut.
  We found a way to detect when the kernel feature is disabled and apply the
  --no-sandbox flag in those situations without any actions from the user.

See also known issues.

Happy syncing!