* gladeui/glade-property-class.c: print a message for missing displayable values in
  glade_property_class_update_from_node() and gpc_get_displayable_values_from_node()

* plugins/gtk+/glade-gtk.c: removed inline displayable values in
   glade_gtk_image_type_get_type() and glade_gtk_button_type_get_type()

* plugins/gtk+/gtk+.xml.in: added missing displayable values in GtkToolButton::glade-type,
  GtkButton::glade-type, GtkImage::glade-type and GtkArrow::arrow-type

svn path=/trunk/; revision=1398