Fix event overview when events expand through days
Fix event overview when events expand through days

The issue was in the calculation of days between the start and end
datetime of the event. When the time of the event end datetime was
prior to the time of the start datetime, the last day was not
included in the calculation (ex: 1/1/16 14:00, 3/1/16 10:00)

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