[COOP] Fix for Bots shooting trough foliage.

[[R-CON]​Fastjack]

The main problem with vegetation is that the maps are design for Deployment and not for Coop.
Deployment need cover or hiding options for infantry but bots ignoring visual obstacles like bushes.

It depends on the mappers, how friendly they creates the maps for coop.
For excample some coop vehicles like to drive on roads but many roads are only painted and not created with splines so the ai don't know where the roads are on the map.