sw: improve DOCX export of footnote separator

Don't only check the width of the line, but also the line style and the
thickness (0 is not visible).

Also there isn't a separate continuationSeparator in sw, so it should
depend on the same condition as the separator.

Unfortuantely Word doesn't support different separators per section.

Change-Id: I55cb3d82ff20c7a21f7d256ec8ba4a43f1e71faa
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/88131
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@cib.de>
(cherry picked from commit 584c5827f549f39c92f267180889e650d3e99edf)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/88169
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

0 files changed, 0 insertions, 0 deletions