Allow talent managers and/or managers to auto enroll staff members

[chazkii]

Potentially do this through the CSV so that we can allow for reversal.

[chazkii]

Actually, much easier to do it via the web gui.

Best way to do code reuse is to create a new widget called user-list which will use nominees-list as the base. user-list should accept a list of users and potentially a template for the action. This means for the new nominees-list you can just add the template that decides whether to show the New or Edit function.