Relocate the username/password in the create/edit and detail view screens

Purpose: Move the user name/password to the bottom of the Extended Info accordion (since the rest of Extended info applies to all users, but user name/password only applies to library staff).

This needs to be done

1. for the create/edit screen (field username and link send reset password email) and
2. for the detail view screen (field username).

See attached screenshots.

Per discussion with UM SIG 2020-09-30 changed to relocation inside the extended information accordion instead of integrating into the permissions accordeon.