{% url 'admin-tools-menu-remove-bookmark' bookmark.id as form_url%}
{% if form_url %}
<form id="bookmark-form" action="{{ form_url }}" method="POST">
    <input type="hidden" name="next" value="{% firstof url request.get_full_path|urlencode %}" />
    <button id="bookmark-button" class="bookmarked" type="submit">Remove</button>
</form>
{% endif %}