[MIN] Clean URL for material in subcontribution
[MIN] Clean URL for material in subcontribution

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