spothole/templates/widgets/data-area-header.html

<div class="card-header">
    <div class="row">
        <div class="col-auto me-auto">
            Data
        </div>
        <div class="col-auto d-inline-flex">
            <button id="close-data-button" type="button" class="btn-close btn-close" aria-label="Close" onclick="closeDataPanel();"></button>
        </div>
    </div>
</div>