File manager shortcut

Improvements for Windows 10 users:

• When you first register your computer on the Cozy, the app will add your
  Cozy Drive folder to the Windows Explorer sidebar (near the OneDrive one).
  If you disconnect from the settings, the sidebar shortcut will be removed.

Improvements for macOS users:

• When you first register your computer on the Cozy, the app will add your
  Cozy Drive folder to the Finder favorites. It will still have a normal
  folder icon though (same as the real folder).
  Also the favorite will not be removed when you disconnect. You can still
  easily remove it by hand.
  These small details should be fixed soon.
• The app will synchronize macOS folders without their custom icons (those
  are stored in hidden files with weird character in their name, which is
  not supported by the Cozy at the moment, and was triggering synchronization
  errors).

Improvements for all users:

• The temporary .cozy-desktop folder inside your Cozy Drive one was renamed
  to .system-tmp-cozy-desktop, to make sure even people displaying hidden
  files in their file browser won't try to put files in it and expect them
  to be synchronized.
• Logging improvements (for debugging purpose)

Happy syncing!