hidden toctree entries makes chapters in epub unaccessible
I am making a ebook where I don't want to have links show up in the text so I use the :hidden: tag for toc-tree.
By doing this the chapters are not accessible through the simple forward navigation for eg. in Kindle reader.
You can see it also in Calibre.
I think a reasonable behaviour would be that navigation works as if used without the hidden-tag and that only the links to the included chapters does not show up in the text itself.