muOS names its GBA folder gameboyadvance first, which resolved to ares's
game-boy-advance. mgba lists nintendo-gba, so the fallback set was empty
and an unrecognised GBA game got no file. ares, dgen, picodrive, fbneo,
fbalpha2019 and emux_sms now use the ids the other profiles use, with
their old spellings kept as SYSTEM_ALIASES (bios.sms and fbneo's
Spectrum sets had fallen to the other bucket of the RetroArch list).
A folder whose name spells a machine its core does not run now also
holds the core's machines: a PC Engine CD folder run by mednafen_pce_fast
got no System Card. Install lists and install/games regenerated.
Abdessamad Derraz
fcd6753b9e