Enigmail Wizard Setup shows up at every Tails session

Apparently, even if using Thunderbird persistence, Enigmail Wizrd Setup shows up at every boot ot Tails and launch of Thunderbird.

I guess this is not to expect.

Feature Branch: bugfix/15693-dont-show-enigmail-wizard-every-time

Original created by @mercedes508 on 15693 (Redmine)

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