Removing unnecessary indentation on DetectableObjectEditor
SteeringEvent was not really necessary, removed

We'll just use System.Action, and pass a radar or vehicle parameter.

New property Steering.ShouldRetryForce to indicate if the steering
should retry its force calculation. This previously used the Action on
SteeringEvent, something I was never really happy with.
BUGFIX: Should only set ReportedArrival if we didn't set a new force