[PATCH] fix gconfig crash

I ran glade-2 on the glade file, fixed two missing stock icons and
cleaned up the C code that inserts the single/split/full modes. The
rest of the patch is minor cleanups only. I refrained from using all
the included xpm icons in images.c (like qconf.cc does) in favour of
using the stock Gtk+ icons instead. Oh, yes there was a "back" bug
in split mode that I also removed, oh well...

It has been tested with success by several people, including
Jesper Juhl, Randy Dunlap and myself.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>