DOCX import, altChunk: fix missing page break

Somewhat similar to copy&paste, the altChunk mechanism drops styles from
the inner document by default. A surprising consequence of that is
sections in the inner document have the default page size. This leads to
a page break when the content of the outer document ends and the content
of the inner document starts.

Fix the importer to support this:

1) Ignore the page size and number in DomainMapper::lcl_attribute().

2) Pass the start of the current section to the sub-importer, so that it
can insert the starting page break at the right place.

Change-Id: Id3955f2b35a139692254c4ac1233e96eef2620e9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104821
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

0 files changed, 0 insertions, 0 deletions