#Mitra v3.20.0

https://codeberg.org/silverpill/mitra/releases/tag/v3.20.0
https://codeberg.org/silverpill/mitra-web/releases/tag/v3.20.0

- Added reject-keywords filter action. There is a single list of keywords that can be changed using update-config command. Goodbye, Fediverse Chick!
- Added support for generating identity proofs with signify tool.
- Search for a shortcode in emoji picker now returns all matching unicode emojis. They can be used for reactions.
- Added background to code blocks in posts.
- Default post visibility can be changed on the Settings page.
- Fixed federation with services implementing Conversation Containers.