Making borders over no-go's

Please make it so that you can draw a border over no-go zones like you could in silverlight, so that way you can disable that country in the scenario editor and players can see the no-go areas in-game. I tried to do this and the scenario acted as if the countries i drew over the no-go areas didn't exist, so it makes implementing mountains as no-go's an issue as players cannot see them in-game.