On the first chunk of a chapter, add a "previous" link to the last chunk of the previous chapter

[Redmayspecial]

User Story

As a translation manager, when on the first chapter of a book, I would like a link to add a "previous" link to the last chunk of the previous chapter in order to make parsing through the content easier.

Definition of Done

Create a link that will take the viewer to the previous chunk, if available, when at the first chapter of a book.