message: Notify datasource of elevation overlay status upon addition
diff: @@ -1760,6 +1760,7 @@ export class MapView extends THREE.EventDispatcher {
  }
  dataSource.attach(this);
  + dataSource.setEnableElevationOverlay(this.m_elevationProvider !== undefined);
  this.m_tileDataSources.push(dataSource);
  if (this.m_backgroundDataSource) {
  