Updated the migrations so they can specify whether a configuration sync is required
Moved the config sync logic into a MessageSender extension (makes far more sense than AppDelegate)
Fixed a bug where the ShareVC was triggering the 'versionMigrationsDidComplete' twice
Removed a couple of imports for files that had been deleted
Fixed an issue where the "block" button would appear in the NoteToSelf swipe menu
Removed the OWSBlockingManager and supporting files
Removed a number of unused classes and methods
Refactored the BlockListUIUtils to Swift
Updated the HomeVC to count the threads with unread messages using the TSMessageRequestGroup instead of using the UnreadDatabaseView
Removed the OWSMessageUtils 'unreadMessageRequestCount' method
Fixed the unread message counting for message requests
Updated the message request banner to indicate the number of message requests with an unread message
Updated the message request banner to automatically disappear if the user has no unread message requests
Renamed a variable for ReadReceipt management to make it a bit more self-documenting (it looked like it would trigger a read receipt to be sent regardless of the setting)
Fixed a bug where the notification count could be increased for message requests
Fixed a bug where an approved contact could be 'unapproved' due to an order of execution issue when generating the config sync message
Fixed a check to avoid registering for push notifications when on the simulator (old check didn't cater for M1 Macs)
Moved the 'hasHiddenMessageRequests' into the group user defaults so it can be accessed within the notification extension
Added code to handle an edge case where an old client could incorrectly un-approve a contact via a legacy configuration message
Added the MessageRequestsViewController
Added a 'Message Requests' button to the settings screen
Added accept/reject buttons for message requests to the ConversationVC
Added the ability to hide the message request item on the HomeVC (re-appears if you get a new message request)
Added code to handle an edge-case where the message request approval state wouldn't be returned to the sender due to the recipient running an old version of the app
Prevented contacts which aren't associated with an approved thread from appearing when creating a closed group
Disabled notifications for threads which aren't approved
Updated the app notification count to exclude unapproved messages
Updated the app to ignore closed group creation messages if the group has no admins which are approved contacts
Fixed up the keyboard avoidance behaviour in the ConversationVC
Fixed a couple of minor interaction issues which affected some devices
Fixed an issue where the database migrations would run on the 2nd launch when creating a new account (causing odd behaviours)
Fixed an issue where sharing form Safari without adding comments would result in an invalid message getting sent.
Fixed a crash when sharing plain text from safari.
Fixed a crash when localising 'OK' (key and value can't be the same when using the new extension).