Switch members/params from the abstract ITableControl to the concrete TableControl_Impl that is the only actual implementation/ subclass of ITableControl. This is in preparation of Dropping ITableControl completely in an upcoming commit. Change-Id: I1b3bcb87f771f64dd7bf07f1047279524de432fb Reviewed-on: https://gerrit.libreoffice.org/c/core/+/211084 Tested-by: Jenkins Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>