There seems to be a bug on gradebook setup page. Steps to reproduce:

1. Create a course
2. Create an assignment
3. Go to gradebook setup page
4. create 2 grade categories on same level - cat1 and cat2
5. Put assignment grade item in cat1
6. Tick checkbox for assignment grade item

Observe that cat1 and course item checkboxes are ticked while cat2 checkbox is unticked.

Course item checkbox shouldn't be ticked and even cat1 checkbox shouldn't be ticked since we just want to move assignment grade item.

Its seems that using checkbox_toggleall class is not appropriate. Should be just regular checkbox