[new-owner-report] fix: Payment links to payment split

Previously owner-report "Payment" links to APAR payment split. Best
link to the transfer account split thereby showing original
payment. Also creates a link for each transfer split although
theoretically there should only be one. e.g. if 2 non-APAR split in
payment transaction, it'll show "Payment Payment" in the "Type"
column.

gnucash/report/business-reports/new-owner-report.scm

@@ -395,10 +395,12 @@
           (gnc:invoice-anchor-text invoice)
           (gncInvoiceGetTypeString invoice))))
        ((txn-is-payment? txn)
-        (gnc:make-html-text
-         (gnc:html-markup-anchor
-          (gnc:split-anchor-text split)
-          (_ "Payment"))))
+        (apply gnc:make-html-text
+               (map (lambda (pmt-split)
+                      (gnc:html-markup-anchor
+                       (gnc:split-anchor-text pmt-split)
+                       (_ "Payment")))
+                    (xaccTransGetPaymentAcctSplitList txn))))
        (else (_ "Unknown")))))
 
   (define (invoice->sale invoice)