Feature: highlight auto-roll-call time range on course table

[Xanonymous-GitHub]

Description

We can use a box to mark the time period for which automatic roll call has been enabled on the course table page.

• If current time is in a box, then it will be red.
• If current time is not in a, then it will be the default color.

cc. #120 .

How to implement?

Design(optional)

Additional contexts(optional)