How to unhide forums & categoeries.

I will choose this question answered for now ... the question to the answer is a double-sided issue then ...
By using a "crafted" url it is possible to get a view that can be used to restore them, but since there does not seem to be a "formal" link or settings-screen for it , there is no "normally usable" way to do this.

Guess that is a feature that still requires implementation then. aka .. make that a link/gear/icon somewhere on the main forum frontpage, or in the profile/settings of the account.