R1:6ffbee115ba3

Add ApplicationTransactions/CustomField based user profile editor

Summary:
Adds a profile edit controller (with just one field and on links to it) that uses ApplicationTransactions and CustomField.

{F45617}

My plan is to move the other profile fields to this interface and get rid of Settings -> Profile. Basically, these will be "settings":

- Sex
- Language
- Timezone

These will be "profile":

- Real Name
- Title
- Blurb
- Profile Image (but I'm going to put this on a separate UI)…