Ensure grade items remain hidden if explicitly hidden via gradebook (regardless of activity state)

In a new test course, create a graded activity like a mod_assign, where visibility of the grade item is controlled by the gradebook. Create a quiz where the reviwe options say that marks are visible all the time. (This should be the default.) In the gradebook, go to the Categries and items simple view. In another tab, open your User grades report. Verify that both grade items are there, as is the course total item, and the category for all the grades in the course. Verify that, on the categories and items page, all the grade items, except the quiz, have an 'eye-con', and that they work to show or hide the item. Click the 'eye-con' for the grade category. Verify that all the grades items are hidden except the quiz. Then click the eyecon again to make them all visible. On the course page, click the eyecon to hide both the quiz and the assignment. Verify that both grade items are now hidden in the grade book. Repeat the last two steps, but by using the Edit settings form for each activity, rather than the eyecon on the course page. If you get through all that, have a well-earned coffee/beer/mohito.