alerts in /donate do not show if not logged in

[pjeweb]

the error messages produced, e.g. by entering a donation amount below $5, will only show up if a user session is present (NOTE: the user does not have to be logged in, just a session cookie is enough). Also all user input gets lost in that case. Maybe as a workaround you could add client side validation (type="number" min="$min_amount") seems to work fine with jquery-validation