PanelWithManipulatorsBorderAffordanceController Class

It is not expected that typical users of the SlateWithManipulators prefab should need to either interact with or understand this script.

This script contains the logic controlling the border affordance for the slate, as well as prefab state logic. This affordance's behavior is highly specialized, and so too is the logic implemented here. Specifically, this logic deals with the shading of the "rail" affordance, the placement, animation, and shading of the "capsule" affordances, and the logic associated with prefab statefulness (i.e., disabling the slate interactions and affordances when something else on the prefab is selected).