[Feature Request] Go back to the folder where you opened the book after you closed it

[westtle]

I like the new folder system but I find it annoying that whenever I open a book from a folder and close the book it brings me to the "All Books" section on the home page.

It would be nice if when you close a book it brings you back to the folder you opened that book from (and maybe even keep the sidebar open).

[DavidLazarescu]

This should add the requested improvement. I did not change it to re-open the sidebar since it felt a bit off to auto open the sidebar every time you go back.