So I find the empire tree extremely useful, click on planets, my fleet, enemy ships, etc.  In fact during combat I select the enemy ships I want to attack by right clicking on the empire tree icon instead of the actual ship in the main area.

Unfortunately when fleet sizes get too big my empire tree starts moving all over the place.  If I have ships coming from planet A to battle in planet B, everytime a ship arrives my empire tree moves.  In other words I can't look at the enemy fleet and click on things to attack because the empire tree shoots up to my fleet everytime a ship arrives.  It moves when ships jump into and out of phase as well.

Is there some way to stop the empire tree from moving, so that it is stationary unless I move it?  My friend said minimize the planets, which I do early game, but once you have a huge fleet the fleet takes up the entire viewable empire tree.  Thanks.