restore icons in their correct directories

The icons I have for openSUSE are horribly incosistent (see http://bugzillafiles.novell.org/attachment.cgi?id=603546)

This commit restores all icons in their theme directory. Actually it looks like the code is already looking into the /usr/share/hicolor directory correctly.

I tried not to break the SLE package and the icons are the same, but they are no longer in /usr/share/YaST2/theme, so someone who can test SLE should check if SLE is fine without it.