Let me see if I can disable it momentarily when those dialogs appear. I would rather not disable it by default, as I think it may also lead to some confusion, especially when editing GUIs. It's a lot easier when you can see the interface. Leave it with me.
btw, I'd say that has been on your mind for a while! It's one of those really 'persistently annoying, but not that big of an issue' kind of problem that people just deal with. It's high time it got sorted.