{% for column, field in columns.items %} <th>{{ column }}</th> {% endfor %}
{% for column, field in hidden_columns.items %} <th>{{ column }}</th> {% endfor %}
</tr>
{% for column, field in columns.items %} <th>{{ column }}</th> {% endfor %}
{% for column, field in hidden_columns.items %} <th>{{ column }}</th> {% endfor %}
</tr>