Can't remove the proxy port from the Admin page once integrated with web proxy

Once we have integrated with web proxy, we can't remove the Proxy port from the Admin page. (FishEye and Crucible > Admin > Server Settings).

A workaround is shutdown the server, then manually remove it from the config.xml file:
For example;
Change From

<http bind=":8060" proxy-port="80" proxy-host="localhost"/>

To

<http bind=":8060" />

and then restart the server.

Besides, says the web server is down, we can't direct access to the default Fisheye port e.g http://localhost:8060/fisheye.