Empire Window Clutter: A Solution...
Just thought of this idea, not sure if it's been thought of already. I checked Kyro's feedback roundup and saw no existence of this suggestion:
How about having tabs in the empire window to group planets by star?
This should prevent that scroll bar from appearing, unless of course the star has a substantial amount of planets and/or you are using a very low resolution. It also makes things nice and neat

What do you guys think? Good idea? Bad idea? I was thinking this could be an optional thing and have maybe binded hotkeys to quickly switch between tabs. What would also be nice would be if something is happening in a specific star, that tab would flash.

) could be to have tabs to switch between owned planets, team planets (other than yours), enemy planets, and neutral planets.