Fix "Unlink from FaceFX Actor" option for FaceFX Animation

[dpakatheman]

It is not possible to cleanly delete a FaceFX Animation without also deleting its actor. You need to resort to "Replace References" or "Force Delete". The animation is referenced by the actor, and the "Unlink from FaceFX Actor" does not work.

[dpakatheman]

The FaceFX Actor asset needs to be saved before the references are updated. So this issue is "As Designed" but perhaps worthy of adding to a troubleshooting session.