Fix for issue 1379: Added the attribute :desc to indicate the ordering.

If you order the students by last name, in descending order, on a spreadsheet, and try to jump to another page it will automatically revert to ordering them in ascending order while keeping the menu in descending order.

It seems that in the file in which the two menus (jump menu, and number of students displayed menu) are generated, the desc attribute, which indicates whether the order is ascending order (false), or descending order (true), was not present. Adding it has fixed the issue.

I tested it out by creating a spreadsheet and ordering them by last name, and alternating from ascending to descending order.