[FIX] Impossible to remove Webcast Administrators
[FIX] Impossible to remove Webcast Administrators

-Now the list is no more selectable, this means that the red cross
allowing deletion shows up
-fixes #261

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