--groupGROUP-NAME
Display only GROUP-NAMEGROUP-NAME should be one of these names Sawfish, Appearance, Bindings, Focus, Matched Windows,
Minimizing/Maximizing, Miscellaneous, Move/Resize, Placement, Sounds, Workspaces
--flatten display sub-groups inline instead of using a tree widget (good for control center). In normal
`tree' item, don't put frame the widgets
--single-level
Don't display the tree widget.
--socket-idWINDOW-ID
This option allow the ui to be embedded in the gnome control center. This also disables the
ok/cancel/etc buttons and enables a hacky protocol on stdin/stdout