Class Wizard: include guard naming when using namespaces

It would be nice if the class wizard would create an inculde guard which contains class name and namespace when creating a class with a namespace via the class wizard.

Now the class wizard creates for the class "MyNamespace::MyClass" the include guard:
#ifndef MYCLASS_H
#define MYCLASS_H

to avoid duplicate include guards it would be nice if the include guard would be
#ifndef MYNAMESPACEMYCLASS_H
#define MYNAMESPACEMYCLASS_H