Remove "Live Chat" link when using external chat

templates/tickets/layout.html

@@ -7,7 +7,9 @@
     <div class="left-menu">
         <p class="menu-title">{% trans 'Support' %}</p>
         <ul>
+            {% if not SUPPORT_HTML %}
                 <li><a href="/chat"><b>{% trans 'Live Chat' %}</b></a></li>
+            {% endif %}
             <li><a href="/tickets/new"><b>{% trans 'New Ticket' %}</b></a></li>
             <li><a href="/tickets/open">{% trans 'Open Tickets' %}
                     {% if open_n > 0 %}({{open_n}}){% endif %}</a></li>