GTK_OBJECT_IS_FLOATING() will still work, but direct checking
of the GTK_FLOATING flag will no longer detect the floating
reference. Details about floating references can be found in the docs:
- http://developer.gnome.org/doc/API/2.0/gobject/gobject-The-Base-Object-Type.html#floating-ref
+ http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#floating-ref
* Accelerators like (_F) are now stripped from labels when they are
displayed in toolbars. If this is not wanted, the feature can be