Hyphenation is a document-level setting in OOXML (only
disabling hyphenation is a paragraph-level setting),
import/export hyphenation zone in Standard style, similar
to IsHyphenation.
Note: Remove HyphenationZone from grab bag to allow its
modification in Writer.
Fix also grayed out hyphenation zone input box in
Text Flow, when enabling hyphenation.
Follow-up to commit 7a1d4b7d1d
"tdf#149420 sw offapi xmloff: add hyphenation zone".
Change-Id: Ic1a3f13ba4e80338227c3206a0ed619589809328
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/135474
Tested-by: Jenkins
Reviewed-by: László Németh <nemeth@numbertext.org>
5a079652c1