Figure out what to do with "duplicate" schedules

This is from a user request during a user test. When schedules are loaded into PaginatedSchedule, it's tedious for a user to click through many schedules that have the same events at the same times, but have different enrollcodes.

Some things to consider:

• If some of the class sections are full, but there is a duplicate that isn't full, show the non-full one first.
• We could filter out the duplicates or "group" them together somehow