And remove the "handle" nonsense and just pass plain honest pointers to
a real type around

Change-Id: Ic49443f5f8b20890d8335088331fff81585e8981
Reviewed-on: https://gerrit.libreoffice.org/66615
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>