* Add UIScene lifecycle notifications alongside UIApplication ones
* Run styles.sh and update window helper to work on iOS 13
* Refactor foregrounded scene logic into its own method
* Conditional compilation for iOS 13 code
* Add notification parameter to notification selectors
* Fix placeholder
* Fix bug where messages with `app_launch` as a trigger weren't being parsed correctly
* Add a call to display executor check for app launch messages upon completion of initial app launch message fetch.
* Verify that the check for app launch messages gets called on initial app launch fetch
* Whitespace fix
* Fix duplicated error codes in checkAndDisplayNextAppLaunchMessage
* Refactor out logic for looking into app launch/foreground trigger messages to share more code
* Whitespace fix
christibbs