[dev] Little sidebar menu LOGO fix

[Chuck Hagenbuch]

Quoting Daniel Vandal <dvandal at infoteck.qc.ca>:

> I also found another bug due to the expand/collapse sidebar button, in
> Mozilla based browsers, this function doesn't work when the menu is put
> in the mozilla sidebar (Add the Horde Menu as a Mozilla Sidebar pref). I
> haven't enough time to bring a patch now but if I get some free time to
> take more time on it.

Try what I just committed.

-chuck

-- 
"But she goes not abroad in search of monsters to destroy." - John 
Quincy Adams