Reorganization does not affect or impair the title to any property owned or held by the city or in trust for it, or any debts, demands, liabilities, or obligations existing in favor of or against the city, or any pending proceeding. Reorganization does not repeal or affect any ordinance remaining unrepealed, or discharge any person from any existing civil or criminal liability for the violation of any ordinance. Ordinances not in conflict with general laws remain in force until repealed or amended.