Above field of struct SwRectFnCollection were removed because of
loplugin:unusedfields. I can't find them refered in the source
code but they do affect alignments.

Also append correspoinding member functions for SwRectFnSet.

Partially recover d2df0357
and e18b0836.

Change-Id: I38f2b7a31565773b749cfeb1f47574c390d38527
Reviewed-on: https://gerrit.libreoffice.org/31795Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>