I was able to get to the Spell Checker using the path below. However, once in the Spell Checker, I couldn’t get to any of the buttons aside from close.
Path:
Evolution → Compose Message → 1st <no name> → 1st <no name> → 1st <no name> → 1st <no name> → 1st <no name> → Edit → Spell Check [Take Action]
Evolution → Spell Checker → 1st <no name> → here I couldn’t do anything