Added large-icon style for message boxes
Added large-icon style for message boxes

Messages with more than one line that are meant to be prominent (e.g. full page) need a bigger icon.

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