[stable21] Changelog for 11.0 and 11.1

[backportbot-nextcloud]

backport of #5210

11.0.0 – 2021-02-22

✅ Added

• Implement read status for messages including a privacy setting #4231
• Allow moderators to "open" conversations so users can join themselves #4706
• Add conversation descriptions #4546
• Allow pagination for main grid view #4958
• Allow to send messages again when they failed #4975
• You can now push to talk/mute with the space key #4328
• Added support for turns:// protocol #5087
• Add basic support for Opera #4974
• Allow resending email invitations #5052
• Allow to collapse the video strip to focus more on the promoted speaker or screenshare #4363
• Improve previews of images and allow animation of gifs #4472
• Allow to "Raise hand" in a call #4569
• Compatibility with Nextcloud 21

🔧 Changed

• Bring up the conversation creation-dialog when clicking on a group to prevent accidentally spam #5062
• User different border color when own message is quoted #4940
• Move matterbridge settings into the conversation settings dialog #4907
• Updated database structure so all tables have a primary key for database cluster support #4735

🐞 Fixed

• For more details look at the changelog of the alphas and the rc