Initialize the print panel with the NSPrintInfo we have created

Since the Cocoa Print Panel was not initialized with the NSPrintInfo we
had created, it meant that it did get any of the settings from the print
dialog as it was trying to access an invalid NSPrintInfo.

Task-number: QTBUG-32734

Change-Id: I23c766eb13281f4c494656a54d37c5bf28fb68fd
Reviewed-by: John Layt <jlayt@kde.org>