update the table to use a template, which gets rid of lots of casting

Change-Id: Ic9ed3901a33e1cd1a1d4335a704d0dd91a5c2f8a
Reviewed-on: https://gerrit.libreoffice.org/51414Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>