Fixed a regression caused by MDL-64194 resulting in Dashboard - Course
overview pagination not working from second page of courses onwards.
Course overview block should now do the following:
- Display no pagination controls when user has no courses
- Display no pagination controls when less than 12 courses to display
- Only display pagination controls up to the number of courses user is
enrolled in
- Work correctly when on a page greater than the second page.
Added additional pagination options based on the amount of courses the user is enrolled in.
This will allow the user to display all courses on one page if they wish, and scale based on their total
courses up to pages of 96 courses, now defaults to `All` if they have less than 12 courses and hides the
dropdown menu as there is only one choice.
