don't show org logo on dataset page if logo is empty string
don't show org logo on dataset page if logo is empty string

JJediny/jkan,civichelper/jkan,mysociety/jkan,amaliebarras/data-portal-new,cityofsandiego/seaboard,ODTW/jkan,mysociety/jkan,ryanvco34/jkan,ODTW/jkan,jpmeade/jkan,OpenDataSTL/openstl,jpmeade/jkan,4pplefish/jkan,amaliebarras/data-portal-new,iltempe/opendatagentediprato,cityofsandiego/seaboard,laurendamato/jkan,cwarecsiro/jkan,JJediny/jkan,patcon/data.toronto.io,odijkan/odijkan.github.io,samedelstein/jkan,mysociety/jkan,odijkan/odijkan.github.io,ryanvco34/jkan,samedelstein/jkan,ryanvco34/jkan,gioialab/opendatagentedigioia,laurendamato/jkan,gioialab/opendatagentedigioia,JJediny/jkan,iltempe/opendatagentediprato,cwarecsiro/jkan,iltempe/opendatagentediprato,samedelstein/jkan,civichelper/jkan,timwis/jkan-test,timwis/jkan,cforlando/jkan,laurendamato/jkan,carlvlewis/jkan,patcon/data.toronto.io,OpenDataSTL/openstl,cforlando/jkan,4pplefish/jkan,odijkan/odijkan.github.io,carlvlewis/jkan,civichelper/jkan,cwarecsiro/jkan,cityofsandiego/seaboard,timwis/jkan,ODTW/jkan,OpenDataSTL/openstl,patcon/data.toronto.io,4pplefish/jkan,timwis/jkan-test,mysociety/jkan,OpenDataSTL/openstl,gioialab/opendatagentedigioia,carlvlewis/jkan,timwis/jkan-test,timwis/jkan,amaliebarras/data-portal-new,jpmeade/jkan,cforlando/jkan