dashboard: Show MAC address of interface for admins

Superusers now see the MAC address of an interface in the network tab.

circle/dashboard/templates/dashboard/vm-detail/network.html

@@ -37,6 +37,9 @@
         <dl>
         <dl>
           <dt>{% trans "IPv4 address" %}:</dt> <dd>{{ i.host.ipv4 }}</dd>
           <dt>{% trans "IPv4 address" %}:</dt> <dd>{{ i.host.ipv4 }}</dd>
           <dt>{% trans "IPv6 address" %}:</dt> <dd>{{ i.host.ipv6 }}</dd>
           <dt>{% trans "IPv6 address" %}:</dt> <dd>{{ i.host.ipv6 }}</dd>
+          {% if request.user.is_superuser %}
+          <dt>{% trans "MAC address" %}:</dt> <dd>{{ i.host.mac }}</dd>
+          {% endif %}
           <dt>{% trans "DNS name" %}:</dt> <dd>{{ i.host.get_fqdn }}</dd>
           <dt>{% trans "DNS name" %}:</dt> <dd>{{ i.host.get_fqdn }}</dd>
           <dt>{% trans "Groups" %}:</dt>
           <dt>{% trans "Groups" %}:</dt>
           <dd>
           <dd>