Part of epic #1017
AS an admin,
I WANT to add phone numbers to admin, supervisor, and volunteer accounts,
SO THAT they can receive SMS notifications.
How it works now
Currently, email is the only point of contact associated with user accounts.
How it should work
There should be a field for mobile phone on the "edit" page for supervisors, volunteers, and admins underneath "Display name".

Acceptance criteria
Part of epic #1017
AS an admin,
I WANT to add phone numbers to admin, supervisor, and volunteer accounts,
SO THAT they can receive SMS notifications.
How it works now
Currently, email is the only point of contact associated with user accounts.
How it should work
There should be a field for mobile phone on the "edit" page for supervisors, volunteers, and admins underneath "Display name".

Acceptance criteria