interactive-apps/ngx-dhis2-validation-rule-filter

th[role=columnheader]:not(.no-sort) {
    cursor: pointer;
}

th[role=columnheader]:not(.no-sort):after {
    content: '';
    float: right;
    margin-top: 7px;
    border-width: 0 4px 4px;
    border-style: solid;
    border-color: #404040 transparent;
    visibility: visible;
    opacity: 1;
    -ms-user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}

th[aria-sort=ascending]:not(.no-sort):after {
    border-bottom: none;
    border-width: 4px 4px 0;
}

th[aria-sort]:not(.no-sort):after {
    visibility: visible;
    opacity: 0.4;
}

th[role=columnheader]:not(.no-sort):hover:after {
    visibility: visible;
    opacity: 1;
}