Need to remove e-mail references in the UI for the NUC

Is your feature request related to a problem? Please describe.

When using The Combine on a NUC, one must add a unique e-mail address when creating a user. This makes it cumbersome for creating users in advance of a workshop.

Describe the solution you'd like

Normal use for the NUC is in areas where there is not internet/email service. Should be able to create users without an e-mail and hide or have a different implementation for the functions that depend on e-mail.

1. Site admins should be able to reset a users password
2. We should add a create user option on the project settings
   • Suggest a unique user name
   • Consider making e-mail optional when creating from a project (possibly create user with a bogus e-mail token, allowed to be duplicated)
   • Either enable only on the nook or when the project admin is a site admin
3. Remove 'Invite by Email' on the NUC in the project settings page
4. Remove 'Forgot Password' from Log In page on the NUC

See issue #394

Start by locating the project settings, login, and user-creation UI entry points, then review issue #394 for related context. Check how the NUC mode is identified and how email-dependent actions are exposed. Done means the listed NUC UI changes and the proposed user-creation and password-reset behavior are implemented and verified.