The very first page of the document should always be formatted using
the "first page" settings in the page style, regardless of the page
number set for that page.

Change-Id: I49cb00cef8b1d10120349073dee1511657dc84d1
Reviewed-on: https://gerrit.libreoffice.org/39851Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>