I hate the UI design idea that some types of common pop-up window should become the sole top-level element across the entire program that creaetd it. It should

I hate the UI design idea that some types of common pop-up window should become the sole top-level element across the entire program that creaetd it. It should instead be contained within whatever window/tab it originated. (There might be an exception, but I can't think of one at the moment.)