When book trees were generated, pages in chapters where ALL pages within
were not supposed to be visibile, would be visible due to the code
falling back on the raw relation which would not account for
permissions.
This has now been changed so that a custom 'visible_pages' attribute is set and used by any book tree structures, to ensure it does not fall back to the raw relation.
Added an extra test to cover.
For #2414
- Updated linked images to have obvious focus styles
- Added proper role to notifications
- Made dropdown list focus styles a bit nicer.
- Updated book list chapter child slide down to be keyboard activatable.
Related to #1320
- Changed default focus styles
- Updated dropdowns with keyboard navigation
- Updated modals with esc exiting
- Added accessibility attirbutes where needed
- Made many more elements focusable
- Updated hover effects of many items to also apply when focused within
Related to #1320 and #1198
