Bug 14424: Patron Help Files for 3.20

Bug 14424: Patron Help Files for 3.20

This patch updates the help files for 3.20

To test:

* Visit
 * Main patron page
 * Patron search page
 * Patron permissions page
* Confirm the text is right on all three

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>
(cherry picked from commit 274942abbd299e39ba75b947023bdc881d4a54b4)
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>