New not common test: HMG and multithread

[José Quintas]

It works.
- WINDOW MAIN OFF

- Once dialog name is registered on windows, it is needed to use unique names

- Some small changes on HMG source code

Test using dlgauto. dlgauto uses a counter for all names.

José M. C. Quintas

[José Quintas]

The problem is: WINDOW MAIN OFF and modal window.

On multithread it is a big problem, lock/unlock.wrong window.

changes for multithread are under MT_EXPERIMENTAL

https://github.com/JoseQuintas/hmge/commit/86d356425ccc0c90922d367cfd7ad2d2a1577193

I change _HMG_NAMESLIST from STATIC to THREAD STATIC and adjust where I get error after change.

IT IS A TEST ONLY. NOT READY FOR APPLICATION USE.

José M. C. Quintas