It wasn't really necessary, but I'm going to need this list in a moment, so we might as well use it.
Also it allows us to ensure the options are listed in a certain order.
Also maybe it will help protect against corrupt preferences.
Using namespace subfolder to help organise it and show the inheritance.
Hmm, instead of scopes, we could have different has_many relationships on the Enterprise. Maybe it should be in a concern. We can refactor later I guess.
