Currently, there is no way for a layout to distinguish between "this element is hidden because you have not activated it yet" (e.g. 0/3 shadow orbs) and "this element is hidden because it does not apply to your class/spec/spells" (e.g. shadow orbs when in holy spec).
This is troublesome because some layouts need to show empty placeholder icons, even when the resource is not available, but only if it can be earned under current conditions.

Information should be provided by updates ins #210.