New redline object and table for non-ranged redlines called 'SwExtraRedline'

Added a new redline object for non-ranged redlines called 'SwExtraRedline'.
Examples for such redlines are 'table row was inserted \ deleted',
'table properties changed', 'text was moved' etc.
Also - added a table for these redlines called 'SwExtraRedlineTbl'.

Change-Id: I9190093c97108b7e4923bc8a9feb441ad5c5694f
Reviewed-on: https://gerrit.libreoffice.org/7464
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>