Ignore or hide room changes from meeting schedule diff

[jennifer-richards]

Description

The diff_schedules() view e.g., this URL summarizes the differences between two schedules. In actual use, room changes at the same time are usually not useful. This view should make it possible to ignore room changes and show only changes in time.

This could perhaps be a toggle to show/hide room changes.

So, e.g., in the screenshot below, only these rows should be shown:

• Moved ccwg (2.0h) from Thursday 9:30 at The Auditorium to Tuesday 9:30 at Liffey Hall 2
• Moved dinrg (2.0h) from Friday 13:00 at Liffey A to Wednesday 13:00 at Liffey B
• Moved scone (2.0h) from Tuesday 9:30 at Liffey Hall 2 to Thursday 9:30 at The Auditorium
• Moved nmrg (1.5h) from Wednesday 13:00 at Liffey B to Thursday 13:00 at Liffey Hall 1
• Unscheduled INT ADs Office Hours (1.0h) from Tuesday 17:30 at Liffey Boardroom 3

@flynnliz

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