Fix width of abstract submission instructions box
Fix width of abstract submission instructions box

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