Steps to reproduce the issue

In the plugin description there is a combination J X, when calling a modal window in the control panel - a combination J M.

I couldn't test these combinations because for some reason the plugin doesn't work well for me - the "keyboard shortcuts" script works at best 1 out of 5 times (perhaps reinstalling "tested and tortured" 4.2 will help). Therefore, I ask competent people in the person of developers (@fancyFranci) to make a verdict - which of the combinations works and, possibly, supplement their descriptions in these places.