Roblox Hide Past Username Setting?

On my main account (Im using an alt), I have changed my username. I think that I should be able to hide it, hence it is the name I have tried to get rid of. Please try to get this "question" out here, because I would like to be able to have a setting that hides your past usernames. It should say "Hide Past Usernames" and it should have the options: Everybody can see it, only my friends, or nobody at all. Thank you, and please try to get this "question" public.