fix possible NPE
tidy the API browser; list operations by default but don't expand the operation detail by default so its easier to get a quick summary of a REST endpoint; then the list operations / expand operations act as a show/hide of the operation detail
show version on the API browser too
after invoking an endpoint; show the real URL of the service (not the proxy URL if we used the proxy) so users can copy/paste etc
after invoking an endpoint use a real link to the endpoint so folks can open it in a new browser window and tinker if they want