Improve right to left support in Thunderbird
Apparently, using thunderbird in a language that requiers writing from right to left causes problems solved by the installation of this add-on :
https://addons.thunderbird.net/en-US/thunderbird/addon/bidi-mail-ui/
since we’re preventing the installation of add-ons, a user suggested that we look into shipping this one in tails.
Related issues
- Related to #15807 (closed)
Original created by @goupille on 15764 (Redmine)