Allow Active Effects to `lookup` rolldata on their Actors.

[Zanderaf]

Currently does not seem like Active Effects want to look up roll data on their actors or items (how rude of them). In general, I'd say an AE's tooltip should use the rolldata of its target, whether that be an item or actor, and maybe only if its currently affecting a target.

[JPMeehan]

Active Effects don't have a getRollData method, this is something that probably should be reframed as a core feature request.