treat fields touched in operator== as not being important, which
finds some more stuff (but also adds some false+)

Change-Id: I3f5d504d7dec7945a917afbcd58c92df74f03645
Reviewed-on: https://gerrit.libreoffice.org/62020
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>