While attempting to add a new sense, simply adding it to the config was enough to make it appear in the Senses config, but it cannot render on the actor sheets and cannot save a value for this new sense.

It would be good if all locations (actor sheet, actor data, senses config) drew from the config object.

(This is on the 4.0 branch, don't believe there has been a change in 4.1 tho.)