MDL-49146 single-activity course format: key activity must be visible
MDL-49146 single-activity course format: key activity must be visible

With a single-activity course, visibility to students is controlled by
course visibility. There is no sense in having the key activity not
visible to students, and, if you did, the symptoms were almost
incomprehensible. It was very hard to work out what you had done wrong.

dilawar/moodle