Suggestion: Collapsible/expandable Table of Contents, especially on Pro

[Ashraf-Bashir]

It would be great if the Table of Contents supported collapsible and expandable chapters/sections.

For books with many subchapters, reaching later chapters currently requires scrolling through every subsection in between. Allowing users to collapse a chapter and hide its subchapters would make navigation much faster and keep the Table of Contents much cleaner.

This would work especially well with the touchscreen on X4 Pro, where tapping an expand/collapse arrow next to each chapter would be simple and intuitive.