When a user has the capability "moodle/notes:view" but not "moodle/site:accessallgroups", he cannot navigate to the notes page using the navigation outline.

Steps to reproduce:

• Enable notes on your Moodle site.
• Change capability setting "moodle/site:accessallgroups" to "not set" for role "Nonediting teacher".
• Create a course.
• Create a group in the course (make sure that the groupid does not happen to be the same number as the courseid).
• Enrol a nonediting teacher into the course and group.
• Log in as the nonediting teacher.
• In the navigation outline, navigate to the course entry, then "Participants", then "Notes".
• Clicking on "Notes" will result in an error message: "Can not find data record in database table course."

Background: The notes system does not support filtering by group. However, the outline tries to pass a group filter, generating a link to .../notes/index.php?filtertype=course&filterselect=<id> where <id> is the group id. This invalid parameter leads to the error message.