Icon theme preview

[Jasper Huijsmans]

Benedikt Meurer wrote:
> One of the things that our UI plugin currently lacks is the preview of
> the icon themes, which means one has to select an icon theme to get an
> idea of how it looks (same applies to GTK+ theme of course).
> 
> Attached is a patch that adds a preview icon (as determined from the
> Example field in index.theme or falling back to gnome-fs-directory) to
> the icon theme selection.
> 
> Opinions?

Very good idea. Please go ahead and commit.

	Jasper