message: Spatial view extents were always being expanded for ground plane
  even if ground plane not enabled.
diff: @@ -1548,7 +1548,7 @@ export abstract class ViewState3d extends ViewState {
  public getGroundExtents(vp?: Viewport): AxisAlignedBox3d {
  const displayStyle = this.getDisplayStyle3d();
  const extents = new AxisAlignedBox3d();
  - if (undefined !== vp && !displayStyle.environment.ground.display)
  + if (!displayStyle.environment.ground.display)
  return extents; // Ground plane is not enabled
  const elevation = this.getGroundElevation();
  