Add additional print options

The book currently has support for:

1. Print Book
2. Print Chapter

In the case of the Chapter option, this only allows printing of the current exact chapter and not the whole chapter.

Consider the following Table of Contents:

1. Introduction
2. Wildflowers of WA
   1. The Kimberley
   2. Pinjelly
   3. Margaret River
3. Native plants
   1. Xanthorroea
   2. Succulents
4. Summary

With the current Print Chapter option, if you chose to print the "Wildflowers of WA" section, you would only get the one page, and not each of the sub-chapters.

We should:

1. Rename the current "Print chapter" option to be more specific; and
2. Add a new "Print whole chapter" When viewing a subchapter, or a chapter with subchapters