[dev] patch for PrefsUI templates

[Chuck Hagenbuch]

Quoting David Ulevitch <davidu@everydns.net>:

> PrefsUI requires a file prefs.php for any preference editing.
> 
> A fix to allow the calling file to be used is simple:

Cleaned up (hint: Horde::selfURL()) and committed, thanks!

-chuck

--
Charles Hagenbuch, <chuck@horde.org>
"After a few minutes the most aromatic and nice smelling Italian coffee 
 will come out of the exhaustpipe." - Our stove-top espresso pot