Donate forms should allow prefilling of donate issues

[Rio517]

Currently, we have a some JS that receives URL parms and prefills form data. The action to set form values works globally, except for our donate forms. The name/id we match other forms is not consistant with the donate form. We'd like to be able to also prefill donation forms.

Relevant JS:
https://github.com/MayOneUS/mayday-2.0-frontend/blob/master/_assets/javascripts/_includes/global.js#L15

Donation form HTML:
https://github.com/MayOneUS/mayday-2.0-frontend/blob/master/_includes/donate_form.html

Donate form JS:
https://github.com/MayOneUS/mayday-2.0-frontend/blob/master/_assets/javascripts/_includes/donate_form.js