MAMEUI64

What's New

A newer compiler is used: GCC 11.2 (mamedev version)

Added some previews of improvements that might appear in MAME in the near future

- Sinclair computers: zx80, pc8300, pow3000, lambda: fixed the display, are now playable.
- Added Colecovision SGM (Super Game Module) support (from PR#10816)
- In dkong TKG-02 board, fixed a regression with the background colour (from PR#11170 and MT05052)