MCNP: track() is called too often when using a weight window mesh (performance) #719
Description
Describe the Bug
When using a weight window mesh, native MCNP does not call track if the event in hstory is a mean-free-path weight window mesh event. It just decrements the distance to the surface and continues on.
In DAGMC, we do call track even if the event is a mean-free-path weight window mesh event, causing at least one extra expensive call to track, and possibly more.
We should revisit this logic to prevent excessive calls to track.