The powers conferred by subsection (2) of section ninety-six and by section one hundred and nineteen of the principal Act to suspend or stay judgments and orders and to stay executions shall, to such extent as may be provided by county court rules, be exercisable by the registrar as well as by the judge, and accordingly for the references in the said subsection (2) and the said section one hundred and nineteen to the judge there shall be substituted references to the court.