form_header: Allow extra attributes via caller()
form_header: Allow extra attributes via caller()

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