Force user_id to be integer before sending it via Measurement API (usually for things like logging emails being read).
Made change to Nestable usage so it works in 2.2 and 2.3 (was waiting for Nestable fix:
https://xenforo.com/community/threads/nestable-not-coercing-value.225063/ )
Added option to reset encryption key (used for email tracking) under Admin -> Tools -> Rebuild caches
Fixed FontAwesome icon on button for setting Measurement ID