Use hybrid properties for Survey.has_started/ended
Use hybrid properties for Survey.has_started/ended

DirkHoffmann/indico,mvidalgarcia/indico,indico/indico,OmeGak/indico,ThiefMaster/indico,DirkHoffmann/indico,ThiefMaster/indico,OmeGak/indico,pferreir/indico,ThiefMaster/indico,indico/indico,indico/indico,pferreir/indico,mvidalgarcia/indico,mic4ael/indico,ThiefMaster/indico,DirkHoffmann/indico,mvidalgarcia/indico,OmeGak/indico,mvidalgarcia/indico,mic4ael/indico,mic4ael/indico,pferreir/indico,pferreir/indico,indico/indico,OmeGak/indico,mic4ael/indico,DirkHoffmann/indico