Fix that deleting a per-user conversation label would result in conversations disappearing from the conversation inbox.
Fix viewing the 'exported conversations' page would fetch all exported conversations and filter to what a user could see instead of just that user's exported conversations
Fix conversations with too long a title would fail to export
Fix temp files for exporting not being created when exporting multiple conversations
Adjust admincp display of conversation/message counts to include user totals not just totals in the conversations
Require StandardLib v1.11.0+
Improve support for rendering templates in the mail & api contexts by correctly injecting template filters/functions into multiple rendering contexts
Add type hinting to various add-on only methods
Fix recipient list did not show the membership card pop-up for users who haven't left the conversation
Fix "Attempt to read property "is_admin" on null" with moderator auto-response feature and deleted users
Fix error when a conversation is created where a conversation recipient has already left
Fix last message date for conversations in the trash folder would report the last read date (which may not have been captured) rather than the last message's date
Fix "Call to a member function hydrateRelation() on bool"
Fix conversation "Preview Length" option not accepting 0 to disable it
On an invalid export format, give a more useful error message instead of a server-side error
Performance improvements when a very large number of conversations are present.
Reduce query complexity by removing unneeded joins, and ensuring filtering only touches the minimum number of tables.
Fix kicked users not being re-invitable
Fix admins/mods not seeing a user has left a conversation
Allow users to see that a kicked user has left the conversation even if they do not have the "[ConvEss] View members who have left" permission
Add "Show users who have left but accept future messages as gone" style property (default enabled)