(Exploratory) A teacher can search and filter the list of course participants

This test requires a course with a number of participants enrolled in it.

1. Log in as a teacher, go to the course and view the list of participants via the Participants link in the navigation drawer/block.
2. Try entering a participant name or email address in the search box.
3. Verify that the search results are as expected.
4. Try clicking the arrow in the search box and selecting an 'Inactive for more than...' option.
5. Verify that the search results are as expected.
6. Try clicking the arrow in the search box and selecting a role.
7. Verify that the search results are as expected.
8. Try selecting multiple search criteria.
9. Verify that the search results are as expected.
10. Click the link 'Reset table preferences'.
11. Verify that the list of participants is displayed the same as when first viewing the page.