Draft: Painting with GIMP: Correct hierarchy levels of pages
Looking at https://testing.docs.gimp.org/2.99/en/gimp-painting.html, the pages "Using Quick Mask Mode", "Adding New Brushes", "The GIH Dialog Box", "Changing brush size" are incorrectly listed as top level pages instead of second level pages below the "The Quick Mask" resp. "Brushes" concept pages.