ADD: helperGroup to Viewer scene, moved bounding box display into it
ADD: helperGroup to Viewer scene, moved bounding box display into it

fredludlow/ngl,fredludlow/ngl,arose/ngl,j0kaso/ngl,arose/ngl,arose/ngl,fredludlow/ngl,fredludlow/ngl,arose/ngl,j0kaso/ngl,j0kaso/ngl