catch client side error when no file for upload is selected
catch client side error when no file for upload is selected

fhinkel/tryM2,YueRen/tryM2,YueRen/tryM2,YueRen/tryM2,fhinkel/InteractiveShell,antonleykin/InteractiveShell,fhinkel/InteractiveShell,fhinkel/tryM2,antonleykin/InteractiveShell,fhinkel/InteractiveShell,antonleykin/InteractiveShell,fhinkel/InteractiveShell,fhinkel/tryM2,fhinkel/tryM2