.. hori/vert lines only"

This reverts commit f8b4d371. Tomaz
considers this ugly and it's no longer needed since commit
93abdf39 (sw lok: assume no windows in
SwLayoutFrame::PaintSwFrame(), 2019-05-14).

Conflicts:
	basegfx/test/B2DPolygonTest.cxx

Change-Id: Ia9b29921ff3e5d82085e1abf9f39c172357a5e13
Reviewed-on: https://gerrit.libreoffice.org/72297Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins