guard against getApplicationData() callback after app has returned to the simulation list
guard against getApplicationData() callback after app has returned to the simulation list

mkeilman/sirepo,radiasoft/sirepo,mrakitin/sirepo,mkeilman/sirepo,radiasoft/sirepo,radiasoft/sirepo,mkeilman/sirepo,radiasoft/sirepo,mkeilman/sirepo,mrakitin/sirepo,mrakitin/sirepo,mrakitin/sirepo,radiasoft/sirepo