Update public/unicaen/app/css/unicaen-icon.css

{

    content: "\f14a";

}

.icon.icon-lier:before,

.icon.icon-link:before {

    content: "\f0c1";

}

.icon.icon-delier:before,

.icon.icon-unlink:before {

    content: "\f127";

}

.icon.icon-trier:before,

.icon.icon-sort:before {

    content:"\f160";

}

.icon.icon-trier-alpha:before,

.icon.icon-sort-alpha:before {

    content:"\f15d";

}