Session.Visualize breaks if gridness autocorr checked

[wchapman]

To replicate, open visualize and check gridness autocorr before checking a gridness score. Two possible solutions:

1. Remove this option. The actual plot differs whether you're using Gridness2/3 (and the callback for those do the plotting)
2. Affect whether Gridness2/3 actually generates the donut RM (currently, they do, and there's no way around it)