
Merged from STABLE:

Fix for bug 4127:

In the course participants page, selecting an initials filter in one course
and then moving to another (the filter would propagate) could result in few
or no results being displayed. The teacher would then have no way of
resetting the filter and viewing all (or possibly any) participants.

Fixed by making each course participant page independent. They no longer
share sort orders, collapsed column state, or initials filters.

dilawar/moodle