selection: allow negative scores to reduce the weight of a mirror
selection: allow negative scores to reduce the weight of a mirror

etix/mirrorbits,kib/mirrorbits,Myself5/mirrorbits,kib/mirrorbits,wsnipex/mirrorbits,etix/mirrorbits,Myself5/mirrorbits,wsnipex/mirrorbits,wsnipex/mirrorbits,kib/mirrorbits,Myself5/mirrorbits,etix/mirrorbits