Made a tweak to prevent some odd looking keyboard transitions when going to conversation settings
Updated the PagedDatabaseObserver to not call 'onChangeUnsorted' on the main thread (now we can generate the changeset on the background thread so there is less main thread work)
Fixed an issue where the most recently received message from the swarm could be removed from the swarm yet the app would still poll for it, resulting in the swarm always returning the oldest possible messages until the user sends a new one-to-one message
Fixed an issue where the initial scroll offset could be incorrect due to certain message types
Fixed an issue where the title view inside a conversation could jump when pushing to the conversation settings screen
Refactored a couple of ObjC functions to Swift as they were crashing (due to memory allocation?) hopefully this will fix it
Tweaked some DispatchQueue priorities to ensure PagedDatabaseObserver loading is prioritised
Updated buttons to use a standard convention for highlighted states
Updated the new conversation button to follow the new highlighted state convention
Copy tweak
Added a toast when copying the sessionId or group URL (fixes to the toast UI as well)
Fixed the new conversation screen styling
Fixed the styling of the various attachment screens
Updated the buttons on the attachment screen to behave like the input view buttons
Removed the old OWSNavigationBar and OWSNavigationController (logic was buggy and not actually needed in most cases)
Fixed a crash which would occur when rendering a message containing both a mention and a url
Fixed a crash which could occur during migration due to the openGroupServerMessageId essentially being the max UInt64 value which was overflowing the Int64 storage
Fixed a bug where empty read receipt updates were sending messages (even for non one-to-one conversations)
Fixed a bug where loading in large numbers of messages (via the poller) was auto scrolling to the bottom if the user was close to the bottom (now limited to <5)
Fixed a memory leak with the AllMediaViewController (strong delegate references)
Fixed an issue where non-alphanumeric characters would cause issues with global search
Fixed an issue where search result highlighting wasn't working properly
Fixed an issue where the app switcher UI blocking wasn't working
Updated the conversations to mark messages as read while scrolling (rather than all messages when entering/participating in a conversation)
Updated the modal button font weight to be closer to the designs
Added the ability to delete "unsent" messages
