AUGUSTA, Maine — The state’s watchdog commission on government ethics may soon have a full membership for the first time in almost two years. Democratic Gov. Janet Mills has nominated former Maine Attorney General William Schneider, a Republican from Durham, and Hampden Town Councilor Dennis Marble, an independent, to the Maine Ethics Commission, which has operated for nearly two years with four members, a situation that has at times put it in danger of losing a quorum. Besides investigating ethics, campaign finance and lobbying violations, the commission also conduct ethics seminars and oversee the agency that manages the Maine Clean Election Fund.