If a case or other matter is on trial or in the process of hearing when the term of the county court expires, such trial, hearing or other matter may be proceeded with at the next or any subsequent term of court and no motion or plea shall be considered as waived or overruled, because not acted upon at the term of court at which it was filed, but may be acted upon at any time the judge may fix or at which it may have been postponed or continued by agreement of the parties with leave of the court. This subdivision is not applicable to original or amended motions for new trial which are governed by Rule 329b.