fix #1263 hide appHeaderRightSimLoadedSlot unless appState.isLoaded()
fix #1263 hide appHeaderRightSimLoadedSlot unless appState.isLoaded()

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