Switching gradebook type from "Weighted Categories" to "Categories doesn't adjust all the associated category item settings.
1. "Weighted Categories" gradebook with a category that has "Weight items equally" enabled
2. Change the gradebook type to "Categories"
3. The category has still the "Weight items equally" boolean flag set. The gradebook type change didn't reset this settings. We need to reset any setting that is affected by a gradebook type change.