vm-detail.html: Modified the checking and the method used for connect_uri

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

@@ -122,8 +122,8 @@
         </span>
       </div>
       <div id="dashboard-vm-details-connect">
-        <form method="POST" action="{{ instance.access_method}}:cloud:{{ instance.pw }}:{% if instance.get_connect_port %}{{ instance.get_connect_host }}:{{ instance.get_connect_port }}{% endif %}" target="_blank">
-	    <button id="dashboard-vm-details-connect-button" type="submit" class="btn btn-xs btn-default" {% if instance.status != "RUNNING" %}disabled{% endif %} title="{% trans "Connect via the CIRCLE Client" %}">
+        <form method="POST" action="{% if instance.get_connect_uri %}{{ instance.get_connect_uri}}{% endif %}" target="_blank">
+	    <button id="dashboard-vm-details-connect-button" type="submit" class="btn btn-xs btn-default" {% if instance.status != "RUNNING" or not instance.get_connect_uri %}disabled{% endif %} title="{% trans "Connect via the CIRCLE Client" %}">
     		<i class="fa fa-external-link"></i> {% trans "Connect" %}
     	</button>
 	</form>