The city shall have all the powers specifically provided for in this charter, and shall also have all the powers now or hereafter granted to municipal corporations and to cities of its class by the constitution and general laws of the state, together with all the implied powers necessary and proper to carry into execution the powers so granted. The enumeration herein of particular powers shall not be deemed exclusive, but the city shall have and may exercise all the powers which under the constitution and laws of the state might properly be specifically enumerated in this charter.