The GNOME configuration for desktop of root was damaged.
As a result there is no "Computer" icon (at the left bottom corner of starting/default desktop view) giving access to all the X11/Gnome/Yast applications. It looks that root have now no GUI access to applications.

The simplest way to restore default desktop for root is (IMHO) to copy the corresponding configuration file from any user after his 1st GNOME login. But there is a lot of configuration files in .gconf, .gnome, .nautilus, .metacity etc directories. What is GNOME configuration file(s) I need to copy ?