{% load wagtailadmin_tags %}
<th {% if column.classname %}class="{{ column.classname }}"{% endif %}>
    {% if is_orderable %}
        {% if is_ascending %}
            <a href="{{ table.base_url }}{% querystring p=None ordering='-'|add:column.sort_key %}" {% if descending_title_text %}title="{{ descending_title_text }}"{% endif %} class="icon icon-arrow-up-after teal label">
                {{ column.label }}
            </a>
        {% elif is_descending %}
            <a href="{{ table.base_url }}{% querystring p=None ordering=column.sort_key %}" {% if ascending_title_text %}title="{{ ascending_title_text }}"{% endif %} class="icon icon-arrow-down-after teal label">
                {{ column.label }}
            </a>
        {% else %}
            <a href="{{ table.base_url }}{% querystring p=None ordering=column.sort_key %}" {% if ascending_title_text %}title="{{ ascending_title_text }}"{% endif %} class="icon icon-arrow-down-after label">
                {{ column.label }}
            </a>
        {% endif %}
    {% else %}
        {{ column.label }}
    {% endif %}
    {% block after_label %}{% endblock %}
</th>