fix: [UI] Show warning if notification when creating new user could not be send
fix: [UI] Show warning if notification when creating new user could not be send

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