"2) In working with the F5 key in muting tracks and the “back to normal” setting, might it be possible to exit the F5 view by “apply” only and not the “x”, as well? One click would save time, when doing a lot of editing."

I don't follow this one. F5 is now non-modal. You don't need to "apply" anything for mutes/back to normal. It applies changes automatically and you can navigate chord sheet as you wish selecting any other bar and continue further with mutes/unmutes until satisfied... without closing it. I am not even sure what that "apply" button does. You are 1 click (X) away from closing the dialog.

With hope that PGM is serious about UI design for 2026, most agree that modular panels are the way to go. If that is the case, I am sure that F5 will make it there, as it is a popular item.