[Discussions] 'Closed For Comments' in Discussion Index page - move here automatically, if a 'Until Date' is set

Problem statement:

'Closed for Comment' discussion boards, aren't automatically moved into the 'Closed for Comments' section in Discussions Index page.

Proposed solution:

After the 'Until Date' has passed, automatically move the board into the 'Closed for Comments' section in Discussions Index page.

User role(s):

instructor,ta