When the country overview window is open, we can click elsewhere on the globe and be transported to another country.

Not so if we have already opened Laws or Media sub-window: this makes the planet non-clickable and non-draggable. Maybe let the player click (and drag?) away to another country when Laws or Media window is open?

Hmm, you mean if the player can see the globe behind the Laws/Media window, they should be able to click out of the window by clicking the globe? That might be possible - unfortunately my UI/window code is a bit hacky so it might be tricky.