[horde] hide module options

[Vilius Šumskas]

> Hello Jan,
> 
> I found a temporary solution for this: removing (or renaming) the prefs.php
> file for the specific module. We have no preferences with that module so it
> won't affect nothing.

Forgot to ask;  what exactly are you trying to achieve? If you don't want to allow users to change some preferences, then you should lock them in prefs.local.php.

-- 
   Vilius