Creates a new GtkMenuToolButton using icon_widget as icon and label as label. Since 2.6
a widget that will be used as icon widget, or NULL. [allow-none]
a string that will be used as label, or NULL. [allow-none]
ConstructionException GTK+ fails to create the object.
See Implementation
Creates a new GtkMenuToolButton using icon_widget as icon and label as label. Since 2.6