WIP: Documentation for Publishing Changes

This is only true if the course start date has not been changed from its default value of 1/1/2030. Sections inherit their start date from the course start date. If the start date has not been changed, we display "Unscheduled", but if the start date has been changed to anything else, we show the inherited date. And if the course start date is in the past, newly created Sections will be immediately visible to students.

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