Hide Sharing section of Vidalia

Users might think that the Sharing section of Vidalia can allow to turn Tails into a Tor relay. That’s not working for the moment, so we could hide this section of the UI.

Related issues

Related to #5418 (closed)
Related to #6844 (closed)
Related to #5939 (closed)
Related to #5716 (closed)

Original created by @tails on 5438 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information