Added, Things mode, Visual mode: event lines for InterpolationPoints are now curved when appropriate setting is enabled in the control thing (PathFollower/ActorMover/MovingCamera) [heavily inspired by Xabis' patch].
Added, Things mode: the editor will try to reconnect the path when deleting InterpolationPoints and PatrolPoints.
Internal: RenderArrows method now works the same way in Renderer2D and Renderer3D.
Internal: Line3D now has "renderarrowhead" property.