Reviewed #1688, Show parent shelves on books page

- Moved list to the left of the page to align with other navigational
items.
- Hid list of no shelves, to help hide shelf references if not in use.
- Tweaked test to ensure it wasn't finding shelf name in breadcrumb
rather than list being tested.

app/Http/Controllers/BookController.php

@@ -114,7 +114,7 @@ class BookController extends Controller
     {
         $book = $this->bookRepo->getBySlug($slug);
         $bookChildren = (new BookContents($book))->getTree(true);
-        $bookParentShelves = $book->shelves()->visible();
+        $bookParentShelves = $book->shelves()->visible()->get();
 
         Views::add($book);
         if ($request->has('shelf')) {