Updated the HomeVC, SettingsVC and GlobalSearch UI to use theming
Removed the "fade view" gradients from the various screens
Added a simple log to the PagedDatabaseObserver to make debugging easier
Updated the FullConversationCell to also show the "read" state for messages
Updated the read receipt icons to use SFSymbols directly
Updated the PlaceholderIcon to use the PrimaryColour's as it's colour options
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
Updated the logic for the background fetch timeout to happen in the AppDelegate and be based on a system property to avoid a few edge-cases
Removed the ID Blinding error handling 'e' suffix (as it's not actually part of the error)
Fixed an issue where the app could crash when entering the background during migration
Added the old 'messageServerIdsToRemove' code back for the time being to support the deprecated deletion behaviour
Updated the database to better support the application getting suspended (0xdead10cc crash)
Updated the SOGS message handling to delete messages based on a new 'deleted' flag instead of 'data' being null
Updated the code to prevent the typing indicator from needing a DB write block as frequently
Updated the code to stop any pending jobs when entering the background (in an attempt to prevent the database suspension from causing issues)
Removed the duplicate 'Capabilities.Capability' type (updated 'Capability.Variant' to work in the same way)
Fixed a bug where a number of icons (inc. the "download document" icon) were the wrong colour in dark mode
Fixed a bug where the '@You' highlight could incorrectly have it's width reduced in some cases (had protection to prevent it being larger than the line, but that is a valid case)
Fixed a bug where the JobRunner was starting the background (which could lead to trying to access the database once it had been suspended)
Updated to the latest version of GRDB
Added some logic to the BackgroundPoller process to try and stop processing if the timeout is triggered (will catch some cases but others will end up logging a bunch of "Database is suspended" errors)
Added in some protection to prevent future deferral loops in the JobRunner