fix: [events] Added loading indicator when paginating on event's attribute table
fix: [events] Added loading indicator when paginating on event's
attribute table

MISP/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP