Identify disabled features in PF1

[mkahvi]

Features can nowadays be disabled in character sheets to support various conditions that do exactly that. TAHUD currently shows them as being perfectly functional.

This needs simple test against the boolean item.isActive which should be the same as with buffs, for determining if an ability is disabled or not. These features can be displayed as disabled, or even omitted entirely.

This doesn't necessarily need to have a way to toggle this for features, but if the UI method for that can be figured out over triggering the feature, that'd be awesome.