Upgrade Thunderbird to 60.5.1
Feature Branch: bugfix-16422-thunderbird-60.5.1, icedove:bugfix/16422-thunderbird-60.5.1
Related issues
- Related to #16529 (closed)
- Related to #16570 (closed)
- Related to #16573 (closed)
- Blocks #15507 (closed)
- Blocks #16045 (closed)
- Blocks #16555 (closed)
Original created by @intrigeri on 16422 (Redmine)