fix: JSON export via the UI should download a file, not render the JSON
fix: JSON export via the UI should download a file, not render the JSON

SteveClement/MISP,Rafiot/MISP,TheDr1ver/MISP,FIRSTdotorg/MISP,TheDr1ver/MISP,FIRSTdotorg/MISP,TheDr1ver/MISP,MISP/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,devnull-/MISP,devnull-/MISP,Rafiot/MISP,Rafiot/MISP,MISP/MISP,FloatingGhost/MISP,MISP/MISP,FIRSTdotorg/MISP,SteveClement/MISP,devnull-/MISP,SteveClement/MISP,devnull-/MISP,FloatingGhost/MISP,TheDr1ver/MISP,FloatingGhost/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,Rafiot/MISP