-- Fixed AI_CAP_ZONE: Groups not engaging when an engage was "aborted",
but was actually erroneously set to "Accomplished". Is fixed now. An
engage that cannot be accomplished (due to no unit in the Engage Zone,
will be Aborted). Groups are engaging now when an Engage Zone is set.
-- Fixed FSM: There was a big issue with delayed function scheduling.
When creating "loops", meaning an Event handler calles again itself
delayed, would start propagating multiple times when the event was
scheduled, and another schedule of the event would be planned.... Thus 2
to x events handled and would end in chaos. Implemented delayed event
scheduling accepting a *negative* parameter in seconds, which would
check if an event would be already scheduled. If so, no new event would
be scheduled until the event handler would have been processed. In this
way, only maximum one event can be scheduled when this is wanted (this
is not always the case by the mission designer). So providing a negative
value as the seconds would make the event being scheduled only once!
-- Added EventPriority field in EVENT logging
-- Removed logging from POSITIONABLE
-- Moved the start of the detection to the Start event handler in
AI_CAP_ZONE
