Regressions: refprobes display 90056 90057

these continues the trend of U6 being less user.

  1. preview display was a reflective sphere which is easier to diagnose in-context, now a 6-slice which is less intuitive. persistent option needed as both have their place.

    was:
  2. in URP gizmos don’t show refprobe by default, need to be selected
  3. in URP gizmos don’t show reflection

    was: