Improve E-Stop handling
Delete `state::dispatched_event_button_e_stop()` and
`state::dispatched_event_button_e_stop_rising` implementation.
This is now handled in `dispatcher::special_case_handling(...)`,
that allows to eliminate some functions in `token_mgr`. The eliminated
functions are `reregister_e_stop()` and `reregister_e_stop_rising()`.