CH10 CarValet UISearchBar: Add Search Index item

- Added the magnifying glass to CH10 CarValet UISearchBar. This is an extra example referred to, though not implemented in the book.
- Note that the way of implementing adding the magnifying glass icon and the way of scrolling to the search area are different, and better, than the book.

Thanks to Angelina for catching the lack of the code and enabling me to get to the better way of adding the index and scrolling to the search view.

Signed-off-by: Maurice Sharp <msharp@mac.com>