dashboard: Fix the html tag bug on network page

Turned off the autoescape for the variable which cointains the html tag.

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

@@ -73,7 +73,9 @@
                   {% if l.ipv4 %}
                   {% if l.ipv4 %}
                     <tr>
                     <tr>
                       <td>
                       <td>
-                        {% display_portforward4 l %}
+                        {% autoescape off %}
+                          {% display_portforward4 l %}
+                        {% endautoescape %}
                       </td>
                       </td>
                       <td><i class="fa fa-long-arrow-right"></i></td>
                       <td><i class="fa fa-long-arrow-right"></i></td>
                       <td>
                       <td>