[Fix] Units no longer fire at units that are already dead.
[Fix] Now when you exit full screen hitting the escape key (instead of hitting the exit full screen button), mouse scrolling will properly turn off.
[Fix] UI no longer gets in the way of window scrolling. I also added some padding below and to the right of the unit production menu so you don't accidentally scroll when hovered over an option.
[Fix] Turned off the auto-pause game when the window is not active. It was causing problems for some people.
