show never for access permissions that never expire
{% for access_permission in user.accesspermissions.all %}
<tr>
<td>{{ access_permission.access_restriction.title }}</td>
- <td>{{ access_permission.expire_date }}</td>
+ <td>{% if access_permission.expire_date %}{{ access_permission.expire_date }}{% else %}{% trans 'never' %}{% endif %}</td>
<td>{% if access_permission.can_grant %}{% trans 'Yes' %}{% else %}{% trans 'No' %}{% endif %}</td>
{% if request.user_permissions.access_all %}
<td class="button-cell"><button type="submit" name="delete_access_permission" value="{{ access_permission.pk }}">{% trans 'Delete' %}</button></td>
