tdf#136952 ww8export: always check for breakAfter on last split
This patch primarily adds support for
covering the situation where a rare page-after break
exists on a split paragraph node.
This patch also adds one more aspect to the fixes for tdf#132149,
where a breakBefore wasn't evaluated with the correct CurrentPageDesc.
Change-Id: Ia548c611c1b7b6c66cb7a7c58be1705cd8c42b77
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103275
Tested-by: Jenkins
Reviewed-by: Justin Luth <justin_luth@sil.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>