unify controller#insertChild and commitAndContinueNew
move commitAndContinue vs insertChild logic from field to hnv; remove old unused commit pathways
attempting to fix focus field fieldView out of sync
fix focusField fieldView coming out of sync bug; now can moveLeft over without an error
clean up: remove controller#commitWithRerender, rename HNV#commitAndContinue to enterPressed; remove HumonRootView. fix: didCommit hooks