Such charter, in superseding any previous charter and amendments thereof, shall not affect any right, lien or liability accrued, established or subsisting previous to the time when such charter takes effect, nor affect any action or proceeding pending when such charter takes effect; but such right, lien or liability shall be enforced, and such action or proceeding shall be carried on, in all respects, as if such charter had not taken effect; nor shall such charter be in any wise so construed as to affect any right or liability acquired or accrued under the previous charter and amendments superseded thereby, by or on the part of any city, or any person or body corporate.