Tell users they have to go through Enigmail Wizard at every session

Release notes should be notified because it says that “When starting Thunderbird for the first time after upgrading to Tails 3.8, you have to go through the Enigmail Setup Wizard again.” Buta ctually it’s eveytime you start Tails and launch thunderbird.

Feature Branch: doc/15692-avoid-enigmail-wizard

Related issues

Related to #15602 (closed)
Related to #15693 (closed)

Original created by @mercedes508 on 15692 (Redmine)

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