The feedback and grade information for submission should be returned
for teachers in the evaluation and closed phases.

Jakob Ackermann authored Oct 11, 2017 and Mark Nelson committed Nov 20, 2017

If the privacy option "Accept grades from the tool" is disabled, the
module should not appear in the gradebook when edited inline or when
recover grades is running during enrolment.

The script user/editadvanced.php uses special value of userid = -1 for
the case when a new user is being created. Such a value passes the
non-empty check and would lead to "invaliduser" error.