#22 sort by clone/parent view for arcade ROM

[TonyWoode]

QP can't sort clones beneath parent in the rom view (MAMEUI does this by default and its very handy indeed).
fields 2 and 3 in the romdata.dats are the only fields from the ROMDATA that are not displayable in the roms windows. Exposing these might help.
If they could be displayable this would allow you to at least have just parent roms at the top, You could then include a third computable field in the roms window: 'CLONE/PARENT' that prints Field 2/'romname' unless there is a Field 3/'Clone of' in which case it prints that instead. If you had that you could sort by it and this would give you something approaching the MAMEUI view where all clones are sorted with the parent

if the above was done, is there anyway to offset clone roms in the roms window like MAMEUI does?