Added expand/collapse all in eventGraph->display
Added expand/collapse all in eventGraph->display

Rafiot/MISP,devnull-/MISP,SteveClement/MISP,FloatingGhost/MISP,FloatingGhost/MISP,Rafiot/MISP,MISP/MISP,devnull-/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,SteveClement/MISP,FIRSTdotorg/MISP,MISP/MISP,FIRSTdotorg/MISP,devnull-/MISP,FloatingGhost/MISP,devnull-/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,Rafiot/MISP,SteveClement/MISP,FloatingGhost/MISP,Rafiot/MISP,MISP/MISP