It is inherited per CSS Fonts, so the children of a group must inherit
it when set on the group.
Change-Id: I3a7f1c58b249e0d647c3b8a15f9e2043b7d6c891
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/209212
Reviewed-by: Khaled Hosny <khaled@libreoffice.org>
Tested-by: Jenkins