Add support for 'Table Row Redlines' in SW core

This patch adds support for 'Table Row Redlines' (such as 'table row inserted'
or 'table row deleted' in SW core).
This is done by adding a new object called 'SwExtraRedlineTbl' that holds all
the redlines that are not of type 'SwRangedRedline'.
Also this patch adds a function for adding these types of redlines to the
'SwExtraRedlineTbl' object.
It also further develops the 'SwTableRowRedline' object.

Change-Id: Ic285f33e4f5af8f197d8fc24c2a8a3777755afad
Reviewed-on: https://gerrit.libreoffice.org/7821
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>