Multiple requests still possible after AJAX timeout

[tgpfeiffer]

I've just started to use your code in my project and it works great from the user's perspective. However, when the LiftRules.ajaxPostTimeout is over, the call will be repeated, even if it's still running.

I think that, if possible, also the repetition of the AJAX call after the timeout should be avoided.

[petercoons]

Totally agree. If you want to open a PR, we can add this functionality.