By a 4-3 vote at 11:15 p.m. tonight, the Falls Church City Council gave a preliminary approval to an ordinance to move municipal elections from May to November. It followed a 4-2-1 vote against an alternative resolution by Councilman Lawrence Webb to put the matter to a public referendum. Voting yes for the election date move were Mayor Robin Gardner, Hal Lippman, Dan Maller and Dan Sze.