Changes

Add pause function for mocap (toggling with the Pause key), useful for cases like when you want to do a pose capture, or need to leave the webcam for a while during live streaming (video demo)
Reduce false positives in arm motion detection during upper only mocap, by validating with associated hand detection
Improve compatibility of different ARKit blendshapes naming, by ignoring casing of the initial letter
Fix various UI issues
Update motion config to allow shoulder rotation blending
Update motion config to allow elbow lock based on smallest angle
Update N8AO library
Disable pose changing when the avatar model is hidden

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