.d-none {
    display: none;
}
/*Administration*/
/*Mails automatiques*/
#colgauche > fieldset:nth-child(0n+4) > ul > li:first-child {
    display: none;
}
/*Authentification et LDAP*/
#colgauche > fieldset:nth-child(0n+5) {
    display: none;
}