Reviewer management redesign

The redesign revolves around having a list of reviewers ordered by preference, that once set up will automatically go through invitations.

More specifically, the editor:

• Goes to the page and creates a pool of possible reviewers.
• Drags and drops people on the list to order them by preference.
• Sets how many reviewers should be invited at the same time, how many days the system should wait before a reminder and how many days to wait until the invitation is revoked. (note: these could also be system-wide settings)
• Clicks on a "run" button to start the invitation process.

If the reviewer declines, or the maximum waiting period passes, the system moves on to the next person on the list and repeats the process. The functionality should allow for manual overrides to cover edge cases (eg. a reviewer declines via email and not through the system)

An example:

Let's say the editor wants a single reviewer for this manuscript version, the waiting time for reminders is 2 days and the invitation expiration time is 6 days. The editor has chosen Reviewer A, Reviewer B and Reviewer C in that order.

On clicking "run" the system invites Reviewer A. They don't immediately respond, so a reminder email is sent to them after 2 days. They still don't respond, so after 6 days Reviewer A is uninvited.

Then it moves on to inviting Reviewer B, who immediately logs in and declines the invitation.

It finally moves to Reviewer C. They accept the invitation, so the invitation system "stops" for this version.

Under normal circumstances, the editor will not have needed to do anything beyond choosing the initial list of reviewers.