This part adds features to add rows/cols
after the selection which is a new behaviour.

Change-Id: Iec1201ae56970cd3dd0622c2ffa1eb6e46ad7446
Reviewed-on: https://gerrit.libreoffice.org/15831Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Yousuf Philips <philipz85@hotmail.com>