Add intermediate animation steps for red flash immediately prior to a portal entering the neutral state

[karlmutch]

As an observer
I want to see a red flash prior to portals going to complete neutral
In order that the facility for short time-span special effects can be validated

Might require improved debugging running at a faster refresh rate
Might require validation of as yet unused timing and sequence functions in the animation library
Requires state tracking and probable reorganization of the existing animation code which is essentially stateless