[bug, csc] Common Cold passive does not trigger properly

Common Cold does its "Everyone gets sick!" triggered ability in place of its supposed activated ability. It's also overzealous about that ability, poisoning all effects in play like how Volcano and Napalm Strike used to. It does not execute the triggered ability as appropriate when it gets dizzied by an external spell or ability or when it attacks.

(I have a sneaking suspicion the failure of the triggered ability showed up somewhere before, but the forum search failed me.)