Bug: HP gauge extend outside container when aid expired

from Rasoul:
> The 'aid' affect expiring made the HP bar in the vitals tab longer, extending outside the tabs panel. But only for a second, until the current hp got updated to the new, lower max hp.

Start by locating the vitals tab's HP gauge and the code handling expiration of the 'aid' effect, then reproduce the transition to a lower maximum HP. Done means the gauge remains inside the tabs panel while the current HP updates after the effect expires.

Written by the indexing model from the issue text.