Other fixes:
+ Restored sound.
+ The add to invoice button now correctly accumulates favorite invoice ships.
+ Stations no longer cause combat rounds versus gate ships.
+ Fixed some pathological combat AI issues that were preventing it
from attacking certain features such as deployted gates.
+ Fixed new Zuul AI slow-boating.
+ Fixed tech tree issue involving Plasma Focusing.
Additions:
+ Added 3-second combat ending warning.
+ Fleets with damaged ships now display red in lists.