WinUAE 2.1.0 Beta 23

[Demon Cleaner]

Beta 23: (RC1, max 1 week left for possible bug reports)

* SPS library return code check added, show notification if selected image requires newer library version
* Quickstart DF1: and CD localization fix
* beta warnings disabled

[Harrison]

Finally close to a final release of 2.1.0? This has been a lot of betas.