Allow TPC members to easily send reminder by email to external reviewers

[obonaventure]

It would be nice if the status page for each paper could contain a button that would enable any TPC member to immediately send an email to remind a late reviewer for this specific paper. We use Hotcrp to handle the papers submitted to the SIGCOMM CCR newsletter and often use external reviewers who sometimes are late and need to be reminded.

Thanks

Olivier Bonaventure