Python trace does not record changes to stream tracer seeds

If you are running the python trace, it will not pick up changes to the seed type. So it will not record changes to the endpoints of a line source or the center and radius of a point source.

To replicate, do the following.

1. Load disk_out_ref.ex2. Load all variables. Apply.
2. Add the Stream Tracer filter. Apply.
3. Turn on python tracing (Tools -> Start Trace).
4. Change the Seed Type for the stream tracer to Point Source.
5. Change the Center and Radius of the seeds to some different values.
6. Apply the stream tracer.
7. Turn off python tracing (Tools -> Stop Trace).

If you look at the resulting script, you can see where the seed type was changed to Point Source, but it does not set the center or radius. (Note that if you create the python script by saving state, it does capture the change.)