Add export deadlines to calendar file (ICS) for reviewers

[tgianko]

This is a feature request/enhancement.

Whenever I get new papers to review, I add the deadline in my calendar. I do the same with papers deadline, as an author. So far I do this manually, but I would be very helpful to export ICS files and get it done with two clicks (export file and import in my calendar).

One solution could be to add a link to the deadline page or give PC chairs the option to attach to the notification sent to TPC members.