Some more CPU improvements due to physics refactor.
This build is a bit risky at features some heavy refactor to fight crash, so please tell me if you find any regression!
Bugfixes
#7636 Rescue Missions can break the game.
#7642 Crash when exiting the game during command selection
#7645 Random Crash
#7648 Help message cancel stretch
#7620 Mining beams were blocked by inactive debris field shields.
Shipyard menu not accessible through a screen.
Thanks for playing!