message: Actually fix instancing in synchronous mode
diff: @@ -1222,6 +1222,20 @@ void MainWindow::importFiles(sg::NodePtr world)
  } catch (...) {
  std::cerr << "Failed to open file '" << file << "'!\n";
  }
  +
  + if (!optDoAsyncTasking) {
  + for (;;) {
  + size_t numTasksExecuted = 0;
  +
  + numTasksExecuted += scheduler->background()->executeAllTasksSync();
  + numTasksExecuted += scheduler->ospray()->executeAllTasksSync();
  + numTasksExecuted += scheduler->studio()->executeAllTasksSync();
  +
  + if (numTasksExecuted == 0) {
  + break;
  + }
  + }
  + }
  }
  filesToImport.clear();
  