admin: hide/show worktime panel

    <!-- hide worktime panel -->
    <span onclick="setCookie('hide-worktime', 1, 365); location.reload();" class="hide-show-worktime-panel" title="Hide worktime panel">«</span>

    <!-- show worktime panel -->
    <span onclick="setCookie('hide-worktime', 0, 365); location.reload();" class="hide-show-worktime-panel" title="Show worktime panel">»</span>