upstream-espocrm/frontend/less/espo/bootstrap/mixins/responsive-visibility.less

// More easily include all the states for responsive-utilities.less.
.responsive-visibility() {
    display: block !important;

    table&  {
        display: table !important;
    }

    tr& {
        display: table-row !important;
    }

    th&, td& {
        display: table-cell !important;
    }
}

.responsive-invisibility() {
    display: none !important;
}