Xref (vrscene) menager

It would be brilliant to have manager for vrscene connected with file.
Have possibilty to connect multiple vrscene files and can turn off / unlink / update them separately.

Imagine a workflow, where:
- User can load static vrscene base scene, with interior or exterior
- and also as an extra "layer" load extra vrscene with walking people or other animated elements like curtains, furnitures etc.

It will avoid exporting tons of heavy, complete animated scenes to get different variations.