Started adding tests for the DisplayPictureDownloadJob
Cleaned up the Crypto singleton a bit
Moved the DisplayPictureManager encryption/decryption into Crypto methods
Added bolding to the control messages
Reworked the MockFunctionHandler to have different calls with inferred return types to reduce boilerplate
Fixed broken unit tests
Fixed an issue which could occur in the ObservableTableSource where it could miss the first output if it returned too quickly
Started adding DownloadDisplayPictureJob unit tests
Minor copy tweak
Added logic to handle promotion messages
Added a debounced toast for promotion failures
Added support for the 'delete_before' and 'attach_delete_before' functionality
Added in the deprecated legacy groups banner.
Cleaned up the UserListViewModel a little
Updated the 'User count' header subtitle to take the user to the 'Group Members' or 'Edit Group' screens based on admin status
Updated the sorting of the group member lists to match the requirements
Fixed the debounced group invite failure toast
Fixed an issue where some libSession errors wouldn't get propagated back into the Swift code resulting in invalid database changes
Fixed an issue where admins couldn't properly leave groups
Cleaned up the Dependencies so that tests can run synchronously without having to custom set queues as much
Sorted out the crypto and network dependencies to avoid needing weird dependency inheritance
Fixed the flaky tests so they are no longer flaky
Fixed some unexpected JobRunner behaviours
Updated the CI config to use a local build directory for derivedData (now works with build tweaks)