New "Header and Footer" style introduced as parent to header/footer styles
Right alignment set for HeaderR and FooterR

Change-Id: Iff407da8907b761236ebc2aa8877b9d6b8294e10
Reviewed-on: https://gerrit.libreoffice.org/64152
Tested-by: Jenkins
Reviewed-by: Heiko Tietze <tietze.heiko@gmail.com>