Not sure if this has been requested before. It would be really great if you could reference a firewall address list in IP--Services for allowed addresses. Very often you would have an address list of "management" IP ranges allowed in the firewall and this is often the same as winbox/SSH allowed IP's.
And yes I get that you could simply create the required rules in the firewall to stop access to the services on the router anyway, but I like to have both options available.