Added the DeveloperSettingsViewModel and dependency-controlled feature flags
Added the generic 'SessionListViewModel' to reduce duplicate code when we want to just display a selectable list of items
Added an indicator on the home screen to show when using testnet
Added group promotions behind a feature flag
Updated the PushNotificationAPI to use bulk subscribe/unsubscribe requests
Updated the 'GroupUpdateDeleteMessage' and 'GroupUpdateDeleteMemberContentMessage' to support additional behaviours
Updated the SessionCell to have better RTL support (swapped some left/right things to leading/trailing)
Updated the revoke/unrevoke endpoints to take arrays of subaccount tokens
Refactored the Bencode logic to properly support Codable types
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 inline errors & warnings (regex could use some work to remove invalid cases)
Added a build step to validate the strings are included in the app and it's extensions
Applied theming logic to the ConversationTitleView, blocked banner
Removed a few redundant modals (replaced them with the "Confirmation Modal")
Removed some duplicate code
Fixed an issue where a synchronous start/stop behaviour was running on the main thread causing some UI blocking
Fixed an issue where the minimised call view could be covered by presenting view controllers
Refactored the SignalApp class to Swift
Fixed a horizontal alignment issue in the ConversationTitleView
Fixed an issue where expiration timer update messages weren't migrated or rendering correctly
Fixed an issue where expiring messages weren't migrated correctly
Fixed an issue where closed groups which had been left were causing migration failures (due to data incorrectly being assumed to be required)
Shifted the Legacy Attachment types into the 'SMKLegacy' namespace
Moved all of the NSCoding logic for the TSMessage