OWMosaic: Handle discrete attributes
OWMosaic: Handle discrete attributes

cheral/orange3,cheral/orange3,qPCR4vir/orange3,qPCR4vir/orange3,qPCR4vir/orange3,qPCR4vir/orange3,cheral/orange3,cheral/orange3,cheral/orange3,qPCR4vir/orange3,cheral/orange3,qPCR4vir/orange3