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
Sorted out some more threading issues
Removed a redundant SyncPushTokensJob run
Fixed an issue where the NotificationServiceExtension could incorrectly setup the database before setting up it's context
Fixed a few warnings
Removed a bunch of legacy code
Refactored the MainAppContext from Objective C into Swift
Created the ThemeManager and the system to control the dynamic theming
Started updating the main settings screens
Added the AppearanceViewController and connected it to the ThemeManager
Started adding theme values
Started applying theme values throughout