[FIX] TT overlap sessions in detailed mode
[FIX] TT overlap sessions in detailed mode

- Closes #1412

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