(a) Unless transferred by a judge of the district court, all civil cases originally filed in the Superior Court shall be tried and concluded in that court.
(b) A judge of the district court may, in the interest of justice, cause a case or cases pending in the Superior Court to be transferred to the district court and may transfer cases pending in the district court to the Superior Court provided that such transferred case is within the jurisdictional competence of the court to which the transfer is made.