call the "kDBItem::Clear" method at the beginning of "kDBItem::Load" method

1. go to Tools → Query Database section
2. run SQL like: UPDATE inp_Categories SET l1_Name = '' WHERE l1_Name = 'Home' to break validation for some category in the middle of categories grid, displayed on Website & Content → Structure & Data
3. go to Website & Content → Structure & Data
4. confirm, that some category with status Active in the middle of the list have empty "Section Title" field
5. select some categories with status Active, including category with empty "Section Title" field, some category before it and some category after it in the grid
6. confirm that pressing Decline button do not change Status for category with empty name, and correctly change statuses for other selected categories, and no fatal error happens
7. restore category name(s) and statuses, changed in this test