opdownheader>
        <dropdowncontent data-bind="foreach: BarPlots">
            <!-- ko with: Colour -->
            <tracecoloureditor class="c-dropdown__item"></tracecoloureditor>
            <!-- /ko -->
        </dropdowncontent>
    </dropdown>

    <div class="c-toolbar__item" data-bind="visible: ShowGroupBy">
        <span style="margin-left:5px">Group by: </span>
        <select data-bind="value: GroupBy">
            <option value="species" selected>species name</option>
            <option value