With 10 days to go before Baltimore’s Planning Commission is scheduled to take a key vote that will affect the Inner Harbor, Mayor Brandon Scott and developer P. David Bramble are holding a public forum to answer questions about Bramble’s $500 million plan to redevelop Harborplace. The two-hour event, called the “Mayor’s Public Forum on Harborplace,” will take place at the Middle Branch Fitness and Wellness Center, 201 Reedbird Ave., on Tuesday, Dec. 12, from 6 to 8 p.m. Scott and Bramble, a managing partner of MCB Real Estate, will lead the discussion.