add more stripe_user[] fields to url, to fill out location https://stripe.com/do...

[todo]

https://github.com/localhelp/findlocal.help/blob/2a36553e75cf78184554b228f5f4607deb5cb129/app/views/shared/_task_modal.html.erb#L99-L104

---

This issue was generated by todo based on a TODO comment in 2a36553 when #92 was merged. cc @localhelp.