Both the compose key and the 3rd level chooser are common and useful
enough to expose in the control center.
Since these shortcuts are a small pre-defined set of only modifier
keys we present them in combo cell renderers.
https://bugzilla.gnome.org/show_bug.cgi?id=682069
Move most of the horrible GConf monitoring code to a separate
GObject(-ish). While quite ugly, it's not as bad as the code that
used to be there before.
Also fix the setting of KeyEntry->model (or CcKeyboardItem->model now)
to be the correct model (eg. the shortcut model rather than the section
model)
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).
