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

[todo]

https://github.com/localhelp/findlocal.help/blob/89c98c85f30a780a71cc222e3d38fb4c613ca310/app/views/shared/_task_modal.html.erb#L99-L104

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This issue was generated by todo based on a TODO comment in 89c98c8 when #86 was merged. cc @localhelp.