Backport MDL-29244 to stable branches

1. Log in as admin 2. Create 2 users who have never logged in (if not already present) 3. Go to user bulk action page (Site administration -> Users -> Bulk user actions) 4. Click "Show advanced" 5. Select "Never Accessed" and click "Add Filter" 6. Make sure the "Never Accessed" filter is visible and "Users" should contain both the users (which were created in step 2) 7. Click on "Remove all filters" 8. Repeat step 4 - 7, witch "Never modified" option 9. Repeat step 4 - 7, witch "Never modified" and "Never accessed" option 10. Login as user1 and logout 11. Log in as admin and repeat 1-9, in case of "Never modified" both the users should be visible and in case of "Never accessed" only one user2 should be visible 12. Log in as another user and "Edit profile" (Settings -> My profile settings -> Edit profile) 13. Log in as admin and repeat 1-9, in case of "Never modified" user1 should be visible and in case of "Never accessed" user2 should be visible and in "Never accessed" and "Never modified" neither one should be visible 14. Assign user1 as teacher of course and repeat step 3 and 4 15. In "Course role" select Teacher and click Add filter 16. user1 should be visible 17. click "Remove all filters" and repeat 14 and 15 with specific category and make sure right user is visible. Note: Make sure to check it on 20 branch.