Selectmen have given preliminary approval to use Community Preservation Act money to fund the second part of a harborwalk from the Town Pier to Museum Beach. Though selectmen advanced the proposal, board chairman Joseph Norton voiced displeasure about using CPA money, which is intended to support affordable housing, open space, historical preservation, and recreation projects. “I’ve voted for these before, but this is a sidewalk, let’s call it a sidewalk,” he said. But other town officials said the project could easily be considered an open space expenditure. “I don’t care what you call it as long as it gets built,” said Selectman Shawn Harris. “It’s the most popular walkways in town.” Selectmen unanimously voted for the measure, which will head to Town Meting on April 9 for final approval.