hide extjs menu when clicking in different iframe

I have an extjs menu in one iframe, and when i click outside this iframe the menu does not collapse, like it does when I click away in the same iframe the menu belongs to.

Do you guys have an idea on how to solve this issue? This actually happens to any component that should hide when it loses focus. So, I'd love to see a more general solution, if you guys happen to know.

Thanks!

P.S.: I'm using version 3.2