68k: update lib, tas fix
helios: refactor fm stereo handling
helios: ignore keys with modifiers when detecting a joypad button press
helios: remember the folder when opening a resource
helios: add option to busy-wait instead of sleeping, should help on windows
md: avoid psg distortion, acquire data more often
md: add support for SMD interleaved dumps, disabled by default
md: fix savestate persist
md: fix ssf2 mapper issue
ui: scaling for HiDPI displays, add drag and drop - contributed by krlvm