Log Message:
thunderbird: Update to 78.2.2

* Runtime depend on chat/libotr.

Changelog:
What's New
new Drag and Drop reordering of recipient pills now supported

Changes
changed OpenPGP: Some signature states reported as "mismatch" now \ 
report "unknown"
changed Privacy policy now displayed in a tab when updated
changed Chat: Non-functional Twitter support removed

Fixes
fixed OpenPGP: Improvements to key importing when failures occur
fixed OpenPGP: Decryption did not work with certain HTTP proxy configurations
fixed OpenPGP: "Discover keys online" option did not work when \ 
searching for an email address
fixed Email filters reported failure when moving a message to original folder
fixed Message filters: Filters shown as enabled in configuration dialog were not \ 
always enabled
fixed vCard 2.1 attachments not handled properly
fixed Sending messages sometimes failed when recipients were in LDAP address book
fixed Non-functional help menu items removed
fixed Adding custom headers in the addressing widget (preference \ 
mail.compose.other.header) did not work
fixed Calendar: Event reminder details were unreadable
fixed Windows 10 high-contrast theme fixes
fixed More theme fixes and improvements