Currently there seems to be no way for a custom action to know when an FSM gets disabled if "Reset On Disable" is unchecked.
Often you'd want to pause the FSM then pick it up again later, but as it is right now there's no way to cleanup / stop things when the FSM gets disabled.
Then OnEnter could get called again when the FSM gets re-enabled to resume the action.
Either that or we'd need some kind of OnDisable / OnEnable calls like with Monobehaviors.
