Support adding Enhancement Powers as part of Vulnerable State

[AlexMooney]

Is your feature request related to a problem? Please describe.

When you lose some MIG during a Vulnerable State, it's useful to add back in Super-Stamina to not explode and die. This is a new rule in Rogue's Gallery.

Describe the solution you'd like

Add an Enhancement Power selection in the Vulnerable State form that becomes active when any MAVRICs are reduced with a selection of valid Enhancement Powers.

Describe alternatives you've considered

Today we can handle this by making characters with split out Super-Strength and MIG, but this doesn't work for e.g. Super-Perception and Super-Intelligence.

Additional context