This fixes the bug that if you Quit while in the Singularity -> Pose
Stand, then you are permanently hovering over the group until you go
into Advanced -> Debug Settings and reset AscentAvatarZModifier.
It also fixes that before, when you changed AscentAvatarZModifier
in Advanced -> Debug Settings then you saw no effect (until the
viewer would sent an AvatarAppearance message.
After this patch, changing any of the AscentAvatar*Modifier settings
has immediate visible effect, and a pose stand (Z-offset) is reset
when quitting.
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