Added XF's native reactions system in both rooms and conversations. It is disabled by default in Chat admin options (Enable reactions).
Added a new room option called "Room users" that allows you to give room access to certain users only. The users set there will join the room automatically and receive an alert about it. Users removed, will leave the room and get a notification. This option is permission based.
Added a new room option called "Repost in selected rooms" that allows you to automatically repost the messages posted in that room in other rooms.
Added a new user permission called "View current room messages after joining it" which allows you to hide older messages from the users who just joined the room. So basically they will be able to see only the messages posted from the time they joined the room. Permission is set to not view by default.
Added a new user permission called "Create room when starting a thread" which will add the option to create rooms when creating threads.
Added a new admin option called "Open internal links in a new tab" which will do what it says.
Added option to embed Chat outside XF in user list options for admins.
Unnecessary queries for some phrases.
Message like not updating without page refresh.
Table BB Code not working.
Added the option to remove your custom message color with a single click.
Added sanction user alerts for any sanction type. This can be toggled on/off per sanction type in admin options.
Added moderator user group permission to view hidden users.
Made some CSS changes to the message for "View whispers" moderator user group permission to have a different color.
Kicked and banned users can still join the room if it is accessed via its URL.
Message not submitting when "Toggle BB code" editor button is enabled.
Added an option to post room announcements which are highlighted messages that you can post in all rooms or in the selected rooms. The message row for announcements can be styled via Chat style properties. This feature is permission based (Chat admin permissions) and it can be accessed from the chat user options menu.
Added an option to choose what to do when users reach the maximum number of rooms allowed to be joined at the same time. You can display a message or leave the last used room and join the new room.
Added an option to display the room list by default if the user hasn't joined any rooms.
Added an option that allows you to delete private chat conversation when user accounts are deleted.
Errors when a user with private chat conversations is deleted.
Users are now removed from the list when they are not active.
User chat status is now updated when user list is updated.
Conversations can now be opened in a popup window.
Random double update requests after some refreshes.
When using the logout feature and having rooms that users cannot leave, tabs still get removed from the chat.
Bot avatars can end up with broken images even when not using avatars.
Added admin option to set the maximum image upload file size.
Added room option to post thread replies back to chat when using the "Thread ID" room feature.
Fixed setting issue with roll command. Edit the command and save it again to update the settings properly.
Fixed bellow breadcrumb position issue where you can end up with two chat instances.
Added room option to prevent users from leaving the room.
Added admin option to set if XF user online status privacy applies to chat or not.
Whispering from user menu doesn't show the username in brackets.
Setting chat as the board index in all pages mode, shows two chat instances.
Errors in certain situations.
Other code issues.
Conversation message edit issue, where the message row is removed from the chat window upon edit.
Guest ban not working as expected.
Note: There is a file that needs to be removed as it is no longer required and will interfere with the message edit JS action. File is src/addons/Siropu/Chat/Pub/View/Message/Edit.php
P.S. This is probably the last release for XF 2.0.x. The next release will be for 2.1.x