Bug 22716: Use gender-neutral pronouns in system preference descriptions

This patch makes a few corrections to the .pref files which provide
descriptions for system preferences. Language like "him or her" is
replaced with "they/them" pronouns.

To test, apply the patch and check the following preferences:

 - OPACFineNoRenewalsBlockAutoRenew
 - ExpireReservesMaxPickUpDelayCharge
 - PatronSelfRegistrationVerifyByEmail

Signed-off-by: Lisette <lisettes@latahlibrary.org>

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>

koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/circulation.pref

@@ -487,7 +487,7 @@ Circulation:
               choices:
                   yes: Block
                   no: Allow
-            - his/her auto renewals.
+            - their auto renewals.
         -
             - pref: ItemsDeniedRenewal
               type: textarea
@@ -625,7 +625,7 @@ Circulation:
                   no: "Don't allow"
             - "holds to expire automatically if they have not been picked by within the time period specified in ReservesMaxPickUpDelay.<br><strong>NOTE:</strong> This system preference requires the <code>misc/cronjobs/holds/cancel_expired_holds.pl</code> cronjob. Ask your system administrator to schedule it."
         -
-            - If using ExpireReservesMaxPickUpDelay, charge a borrower who allows his or her waiting hold to expire a fee of
+            - If using ExpireReservesMaxPickUpDelay, charge a borrower who allows their waiting hold to expire a fee of
             - pref: ExpireReservesMaxPickUpDelayCharge
               class: currency
         -

koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/opac.pref

@@ -748,7 +748,7 @@ OPAC:
               choices:
                   yes: Require
                   no: "Don't require"
-            - "that a self-registering patron verify his or herself via email."
+            - "that a self-registering patron verify themselves via email."
             - "<br><strong>NOTE:</strong> This system preference requires the <code>misc/cronjobs/cleanup_database.pl</code> cronjob. Ask your system administrator to schedule it."
         -
             - "Use the patron category code"