Better solution for .bin / .cue psx files

[iatenothingbutriceforthreedays]

Current behaviour is super confusing because both files appear as roms but bizhawk breaks if you use the .bin file. Could the asset importer recognise both in the same folder and in that situation mark the .bin file as not being a rom?

[iatenothingbutriceforthreedays]

This is a bug to me! haha