email_server: Add button for managing aliases

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/email_server/templates/email_server.html

@@ -13,6 +13,10 @@
      href="{% url 'email_server:my_mail' %}">
     {% trans "Setup My Home" %}
   </a>
+  <a class="btn btn-default" role="button"
+     href="{% url 'email_server:aliases' %}">
+    {% trans "Manage Aliases" %}
+  </a>
 {% endblock %}
 
 {% block extra_content %}