A BonoboUIContainer is a very thin object, it implements the CORBA
interface for doing UI merging, but none of the logic. In order
to achieve the effect it is associated with a BonoboUIEngine object.
Traditionaly the UI container was associated with a BonoboWindow
however, this is now strongly deprecated, since the BonoboUIContainer
can be used with any BonoboUIEngine, not just that used by BonoboWindow.
Here is how your code should interact with the BonoboUIContainer
This function is deprecated, please use
bonobo_ui_container_set_engine instead, we plan to
allow UIContainers to be associated with many things
apart from BonoboWindows.