MSVC Desktop UNICODE defines incomplete

msvc-desktop.conf don't define all windows "UNICODE" needed.

Only "UNICODE" Macro is defined, but windows need "UNICODE" and "_UNICODE", has it is defined in the "Microsoft.Cpp.unicodesupport.props" for MSVC 14 ( And others )

The present version don't compile when using "tchar.h" with need "_UNICODE" defined.

Correct DEFINES for windows should be: "DEFINES += _UNICODE UNICODE WIN32" has it is done in "Microsoft.Cpp.unicodesupport.props".