don't allow column sort on multi-valued fields
don't allow column sort on multi-valued fields

hyoo/p3_web,nconrad/p3_web,dawenx/p3_web,dawenx/p3_web,dawenx/p3_web,hyoo/p3_web,PATRIC3/p3_web,PATRIC3/p3_web,dawenx/p3_web,hyoo/p3_web,hyoo/p3_web,nconrad/p3_web,PATRIC3/p3_web,PATRIC3/p3_web,nconrad/p3_web,nconrad/p3_web