The high-rollers who own front-row seats at Dallas Mavericks games gave up their spots Saturday night as part of the annual “Seats for Soldiers” benefit. Then Dallas’ Josh Howard and Utah’s Deron Williams made sure the troops enjoyed quite a show. On a night when both teams made 60 percent of their shots, Howard’s career-best 47 pushed the Mavericks past the Jazz 125-117 despite a career-high 41…