+ EH improvement on serialization Improved: AI scanning for the target more when a visual contact is lost.
 Improved: AI vehicles scanning area with their weapons when target position is not known exactly.
 Fixed: AI vehicles sometimes see player outside their field of view (https://dev-heaven.net/issues/28203)
The various eventHandlers in game are implemented with the following BUG.
AddEventHandler adds handler into the array and return its index as a unique handle to be used for possible later removal.
RemoveEventHandler removes the item on the specified index.
Which means, the array is shifted and other "unique handles" does not match the proper index after remove.
Fix implements in the similar way as implemented eventHandlers for UI.
Renamed these to class EventHandler and class EventHandlers.