Add the X-GNOME-Settings-Panel category. You need a control-center
panel to add this to your desktop file. Desktop entries with this
category but that aren't actually panels will be ignored (no cheating).
If the desktop file for your settings isn't a panel, it will show in the
"Other" section of the control-center shell
https://bugzilla.gnome.org/show_bug.cgi?id=630998
libcommon.la defines several new GTypes, so it cannot be loaded into the
same process multiple times.
Copy gconf-property-editor to libgnome-control-center as this is useful
for all panels. However, it will need to be converted to GSettings in the
near future.
Copy capplet-stock-icons to the mouse panel, as it is not used in any other
panels.
Remove references to functions not yet implemented for panels (help,
window icon, etc).
