Hide server label in room panel when input is hidden by hide_muc_server=true config

src/templates/room_panel.html

@@ -5,7 +5,9 @@
     <label>{{label_nickname}}</label>
     <input type="text" name="nick" class="new-chatroom-nick"
         placeholder="{{label_nickname}}"/>
-    <label{{server_label_global_attr}}>{{label_server}}</label>
+    {[ if (server_input_type != 'hidden') { ]}
+        <label{{server_label_global_attr}}>{{label_server}}</label>
+    {[ } ]}
     <input type="{{server_input_type}}" name="server" class="new-chatroom-server"
         placeholder="{{label_server}}"/>
     <div class="button-group">