Log Message:
thunderbird: Update to 78.11.0

Changelog:
Fixes
OpenPGP could not be disabled for an account if a key was previously configured

Recipients were unable to decrypt some messages when the sender had changed the
message encryption from OpenPGP to S/MIME

Contacts moved between CardDAV address books were not synced to the new server

CardDAV compatibility fixes for Google Contacts

Folder pane had no clear indication of focus on macOS

Windows theme improvements

Various security fixes

Security fixes:
#CVE-2021-29964: Out of bounds-read when parsing a `WM_COPYDATA` message
#CVE-2021-29967: Memory safety bugs fixed in Thunderbird 78.11