hide token list if there are no tokens

app/index.html

@@ -53,7 +53,7 @@
                         <button class="dialog-submit" type="button" data-bind="enable: tokenToAdd().length > 0, click: addToken()">Add</button>
   		      </td>
                 </tr>
-		<tr data-bind="if: $root.config.connectDialog.token">
+		<tr data-bind="if: $root.config.connectDialog.token, visible: tokens().length > 0">
 		  <td></td>
 		  <td><select id="token" multiple="multiple" height="5" data-bind="options:tokens, selectedOptions:selectedTokens"></select></td>
 		</tr>