App update

Submodule web/app c64200c..ee912fb:
  > Rename the login warning div
  > Notify the user of the current server time in cas of wrong TOTP
  > Return error refactoring in the upload_file function
  > Dont crash if the thumbnail can not be created
  > Notify the user if the image has not resolution information
  > Pass the original file extension from the frontend to the backend
  > Refactoring of the send_cdn_files and send_app_files Rename the path variable to subpath to separate it from the path flask variable instruction