Added the Blocked contacts screen
Added a setting to control whether concurrent audio messages should auto-play
Finished updating the settings screens
Fixed an issue where items that should be removed from the PagedDatabaseObserver due to filter logic weren't getting removed in some cases
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