.bca-icon--mail::before {
    content: "\f0e0";
    font-weight: 400;
    font-family: 'Font Awesome 5 Free';
}
.jstree-proton .bca-icon--mail {
    color:#7faa00;
}
.jstree-proton-contextmenu .bca-icon--mail {
    color:#7faa00;
}