Somewhat braver aliens

[grrussel]

I have a custom OpenXCom - the number of aliens is tied to the difficulty level ; there are very many aliens at the higher levels. This does not make it harder, though. Kill enough aliens, quickly enough, and the rest keep losing morale, panic and go berserk, becoming easy kills and so it perpetuates.

It seems that Aliens should be braver. Especially at harder levels. (although, thats not checked here)