#result_list tbody th:first-child:not(.action-checkbox),
#result_list tbody td.action-checkbox + th {
    position: sticky;
    left: 0;
    background-color: #fff;
    z-index: 2;
}

#result_list thead th:first-child:not(.action-checkbox-column),
#result_list thead th.action-checkbox-column + th {
    position: sticky;
    left: 0;
    background-color: #fff;
    z-index: 3;
}