[horde] Unable to load theme's icons after upgrading

[Chuck Hagenbuch]

Quoting Arminas <g.arminas at gmail.com>:

> I've upgraded horde to the latest, but now when I'm trying to put not
> default theme on all applications, only images declared in *.css is
> loaded on the screen. I'd set only one option in horde preferences
> menu ( prefs['theme'] ) . Ps I was trying to use wps_sober theme.

Themes that provide their own icons have to be updated for Horde 3.2  
(and please, never say just "latest", it's always ambiguous). See  
horde/docs/UPGRADING

> Also i've tried to load any other theme, but results were the same:
> backgrounds and some images changed ( declared in screen.css file ),
> but the buttons is still the same.

Most themes don't have their own icons.

-chuck