gestioCOF/kfet/cms/static/kfetcms/css/editor.css

.snippets.listing thead, .snippets.listing thead tr {
    border: 0;
}

.snippets.listing tbody {
    display: block;
    column-count: 2;
}

.snippets.listing tbody tr {
    display: block;
}

@media (min-width: 992px) {
    .snippets.listing tbody {
        column-count: 3;
    }
}