Labels are set now depending on row/col as left/right and above/below

Change-Id: I73b81660db1e4e8c3d0146f59e193744a3883583
Reviewed-on: https://gerrit.libreoffice.org/59867Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
Tested-by: Jenkins
Reviewed-by: Heiko Tietze <tietze.heiko@gmail.com>