BSE: PartImpl: fix undo steps as to not involve obsolete procedures
BSE: PartImpl: fix undo steps as to not involve obsolete procedures

tim-janik/beast,swesterfeld/beast,GNOME/beast,tim-janik/beast,GNOME/beast,swesterfeld/beast,tim-janik/beast,tim-janik/beast,GNOME/beast,swesterfeld/beast,tim-janik/beast,GNOME/beast,swesterfeld/beast,swesterfeld/beast,swesterfeld/beast,GNOME/beast,tim-janik/beast,swesterfeld/beast,tim-janik/beast,GNOME/beast,GNOME/beast