//printf("PreferencesWindow::set_current_dialog %d\n", __LINE__);
dialog->create_objects();
//printf("PreferencesWindow::set_current_dialog %d\n", __LINE__);
//printf("PreferencesWindow::set_current_dialog %d\n", __LINE__);
dialog->create_objects();
//printf("PreferencesWindow::set_current_dialog %d\n", __LINE__);