Don't hide past occurrences from non-admin users
Don't hide past occurrences from non-admin users

Otherwise, the booking modify dialog gets quite confusing.

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