[UX/UI] First payment flow

[robbiehanson]

Split from issue #205

So that the receiving a first payment becomes a flow on it's own, a special flow.

Stephen breaks this down into a video https://vimeo.com/631148329/5cb023d6df And laso in the figma mockups https://www.figma.com/file/oEvgHnycgPINuXuQV57rD7/Phoenix-Notes?node-id=34%3A879