Make the witness testimony use AOMovie instead of AOImage
Remove pointless "testimony_in_progress" variable
CONTROVERSIAL: Make the witness testimony indicator be position-ignorant so as to reduce the amount of hardcoding and allow broader usage of the witness testimony system (For example, Danganronpa investigation indicator, etc.) - This should not affect how the testimony indicator is received currently, as witness testimony usually requires the entire rest of the court to shut up until the cross-examination either way.
(cherry picked from commit 932f430b68)
