message: Fix MapView.FrameComplete event.
  Fix condition, where PoiTableManager is last one to be ready.
  Before fix, finish of PoiTableManager didn't trigger update and thus
  there was no change to observer, first complete frame.
  Followup of
diff: @@ -3226,7 +3226,10 @@ export class MapView extends THREE.EventDispatcher {
  this.poiTableManager.clear();
  // Add the POI tables defined in the theme.
  - this.poiTableManager.loadPoiTables(this.m_theme as Theme);
  + this.poiTableManager
  + .loadPoiTables(this.m_theme as Theme)
  + .then(() => this.update())
  + .catch(() => this.update());
  }
  private setupStats(enable: boolean) {
  