Message when uploading a file is redudant

When I try to attach a file to a comment that is too big, the error message shows "Try again".

There is no point in trying again, the file won't magically shrunk. For this specific error we should:

  1. not show the "Try again" part:
  2. Update filesize to file size

Screen_Shot_2017-08-03_at_14.25.56