The nomcom settings page does not let the chair set the "accepting volunteers" option

[rjsparks]

Right now, the secretariat has to set this option on the chair's behalf (using the admin). It should appear on the form at /nomcom/yyyy/private/edit-nomcom/ as well.

[jimfenton]

I suspect the first_call_for_volunteers date should also be set if the chair is the first to turn is_accepting_volunteers on.