The height map display was implemented months ago. If you run the mesh leveling from the web interface, it automatically displays the color coded results after it finishes collecting Z data.
If I recall correctly, the heightmap graphic only appears automatically in the browser if you start mesh leveling through the web interface. If you do it through the PanelDue touchscreen the data is saved but not automatically displayed on the web client. Even if it does not appear automatically, you can look at it by going to the web interface Settings/Machine Properties tab. On the right side of the web page will be a helpful button labeled "Show Heightmap"
In DWC 1.15a the "Show height map" function was moved to a drop-down menu next to the Auto Bed Compensation button on the Control page.
