Include guard doesn't follow the given header extension when adding a new class

Steps to reproduce:

1) Select New file or project
2) Select "C++ Class"
3) Set class name as Foo, header as "foo.hpp" and source as "foo.cpp"
4) Observe, that the generated header file contains include guard:

#ifndef FOO_H
#define FOO_H

#endif // FOO_H

However, FOO_HPP would be expected as the given file name was "foo.hpp".

This is also inconsistent behavior, because this works correctly if you select "C++ Header File" in step 2. In that case the generated include guard is FOO_HPP as expected.