During the alien turn, sometimes the aliens move too fast,
and the viewpoint of the camera changes too fast ,
so it is hard to follow what happens.
It would be nice to have options to adjust the speed of this animations:
* animation-speed
* pause-time when changing camera
* maybe also "camera transition" instant (cut) / move between points of view
Issue 1546342 on sf.net, see
https://sourceforge.net/tracker/index.php?func=detail&aid=1546342&group_id=157793&atid=805245
