ick', e => toggle(e, elem, selectors.cluster_size));
    });

    document.getElementById('select-all-systems').addEventListener('click', e => toggleAll(e, selectors.system));
    document.getElementById('select-all-types').addEventListener('click', e => toggleAll(e, selectors.type));
    document.getElementById('select-all-machines').addEventListener('click', e => toggleAll(e, selectors.machine));
    document.getElementById('select-all-cluster-sizes').addEventListener('click', e => toggleAll(e, selectors.