Add Date Range to Class

I want to split the current concept of a "report" and a "class". Right now, you make a class of students, and N reports of date ranges. The backend arbitrarily picks a date range from the reports based on the first to include the current day. It was thought that they would only have one per year, not one per year and one per month!

That set of data is what is shown on the report page and the student pages. I'd like to have the class have a start and end date, and and edit screen. I've already added the fields for from_date and to_date on the class table, but it needs to be added to the UI.

When this is done, I'll be able to change the student page to show whatever information is contained in the class dates.