Mike,
It's a little different as the Window scenario you explain typically only supports one selection, then auto closes. But it is have multiple selection options, then I think you typically have to close it. I can definitely see your point if there is only one runway to extend, but there are always two runways, ie.18/36, and many times more. It's nice to extend your primary, then extend a crosswind option or grass option. We'll continue to bounce it around with Walter, Brian and monitor the demand as well.
I've actually proposed a Menu Auto-Close concept as well. Basically, if you get a menu on screen and don't touch it for XX seconds, user defined time and on/off, then it will auto-close stale menus, etc. If implemented, that may resolve your issue and more. It's on the consideration block. The downside is that if you get distracted for longer than your set threshold, you would be forced to go back to that spot. Stay tuned.