Sparklines for Grouped Heatmaps

The results table for heatmaps has been empty for too long. We've added a sparkline to give you a rough sense of the distribution for that particular group.


Notice that the sparkline is a histogram slice across the group: the left side corresponds to the low values from the heatmap, while the right side corresponds to the high values.

Thanks to Sophie Alpert, of Humu, for the suggestion!