[wow]Howto clear all screens of message boxes / menus

I often have the problem that I have windows open on some toon screens but not on all of them. Or I open a window on my main using the mouse, then press ESC to close it - which opens the "main menu" on all my toon's windows.Pressing ESC again will open the main menu n the main's screen and close it on the toons.

Simple solution for this really annoying thing: press F1, ESC (with the original bindings for these keys). F1 will target the party leader. ESC will now close all open windows on the screens with open windows and clear the target on the screens without open windows. All screens are now clutter free.

I know, this is nothing special, but I really like this "trick" and thought I'd share.