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
Removed an unused notification
Refactored the PrivacySettingsViewController
Refactored the ScreenLock code to Swift
Fixed an issue where the match dark/light setting wasn't getting applied on launch
Update the modal styling for the various settings modals
Updated the share extension to load URL previews.
Updated the ThreadPickerVC to send plain text & URLs in the same way they are sent for normal messages.