§ 20. General powers of court. Any proceeding under this article shall be deemed for all purposes, including review by appeal or otherwise, to be a proceeding had in the court as a court of general jurisdiction, and the court shall have full jurisdiction to do all and every act relating to the assigned estate, the assignees, assignors and creditors, and jurisdiction shall be presumed in support of the orders and decrees therein unless the contrary be shown; and after the filing or recording of an assignment under this article, the court may exercise the powers of a court of equity in reference to the trust and any matters involved therein.