Allow @mentions to be used only by specific roles or themselves.

Right now custom roles can either be mentioned by everyone in the server, or no one at all. Having a setting to give a specific role ping access would be amazing for every discord server that uses custom roles. Instead of having "Allow anyone to @mention this role" we could have "Allow to @mention this role". This should be already as some roles for specific people but either everyone is allowed to ping and if you don't allow everyone then no one is allowed.