Fixed bug #721098 "Anjuta hangs when opening project" The problem was that glade registered GtkOffscreenWindow as a new type derived from GtkWindow to use in the run time which prevents Anjuta or any of its pluggins to use the real GtkOffscreenWindow widget.

gladeui/glade-widget-adaptor.c: use glade_util_get_type_from_name() in generate_type()
to avoid stepping over types that are simply not instantiated yet like GtkOffscreenWindow

gladeui/glade-project.c: Use Adaptor name instead of runtime instance name to avoid
showing GladeFake* types used by the backend for virtual types.