computer-center-extra is no longer with us in F14

[Michael Schwendt]

> The facility System->Preferences->Windows that used to be provided in
> control-center-extras is now provided in control-center.  If you run it
> with Desktop Effects enabled, it produces an error.

Oh, btw, skimming over

  https://admin.fedoraproject.org/pkgdb/acls/bugs/control-center
and
  https://admin.fedoraproject.org/pkgdb/acls/bugs/compiz

I found this bug report:

  Window manager "compiz" has not registered a configuration tool
  https://bugzilla.redhat.com/664711