Can resetNotInProgressProperty be removed from QuadrilateralModel?

[jbphet]

There are some changes being made to the sound library, and one is that sounds are muted/disabled by default during a reset. While integrating this change into the sims, I found the following in QaudrilateralModel:

  // Whether a reset is currently in progress. Added for sound. If the model is actively resetting, SoundManagers
  // are disabled so we don't play sounds for transient model states. Tracks when the reset is NOT in progress
  // because that makes it most convenient to pass to SoundGenerator enableControlProperties.
  public readonly resetNotInProgressProperty: TProperty<boolean>;

I started working to remove it, but this Property is wired through a lot of places in the sim, and it seemed to me like some of the usages were not sound related, so I started getting nervous. I removed it from the one place I could find where it was being passed through to a sound generator, but I thought it best to leave any further modifications to someone who knows the sim better than I. I regression tested my changes, and the sounds seemed to be working fine.

@jessegreenberg - please have a look and see if this can be removed or perhaps renamed. At the very least, the comment should be updated. I'll add a TODO.