by considering the axis direction.

Note: Legend name order in left/right position was fixed in
commit 40144617

Change-Id: Id5bd585a666c3bcf346af5317e9197e6460f932a
Reviewed-on: https://gerrit.libreoffice.org/72670Reviewed-by: László Németh <nemeth@numbertext.org>
Tested-by: László Németh <nemeth@numbertext.org>