Beta59 test release

Beta59 test release
Changes:
Improve support for Commodore 128 80 column (CGA type) mode with profiles for VDCmania demos
Add Commodore 128 lumacode profile
Add support for Atari 800 lumacode and Improve Atari palette generation
Add support for VIC20 lumacode (50Hz only at the moment)
Add PAL artifact (colour blending) on Commodore 64 & 128 lumacode (use long press of SW2 to toggle)
Add Microtan 65 profile
Add Samsumg 400 line CGA card profile
Add Apple IIe Taxan RGB profile
Add Mac Plus profile
Add Mac Radius portrait screen profile
Fix some scaling bugs
Fix profile autoswitch not working with 4K monitors
Add experimental support for Amiga ECS screen modes 1280x256 & 640x480 productivity (CPLD boards only)
Note the 640x256 and 1280x256 cannot be auto selected and must be toggled with SW3
Update various existing profiles.