Separate interface for 'Pending' applications

A membership workflow may look like this:

- member makes application [no status]
- application is acknowledged [status Applied]
- application is approved [status Pending]
- dues are received [status Member] - at this point the application leaves the approve_members page and can be found on memberlist.

This might be a misuse of Pending. If so - then a separate status is needed that conveys "approved by the committee, but something else needs to happen before membership is completely confirmed".
And applications with this status should be viewable probably via a separate page, rather than mixed in with the "not yet approved" applications.