z index of MathJax_MenuFrame

Wondering if anyone has found a suitable work around for the MathJax_MenuFrame and its z-index of 200. We need it to be significantly higher as ext-js has much higher z-indexes.

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Try

<script type="text/x-mathjax-config">
MathJax.Hub.Register.StartupHook("MathMenu Ready",function () {
  MathJax.Menu.BGSTYLE["z-index"] = 1000;
});
</script>

before the script call that loads MathJax.js. Substitute whatever z-index you need and make sure your other CSS has appropriate z-index settings to work together.