Nearly five months after he was labelled the “dark force” behind the bitter Barne Estate dispute by lawyers for bloodstock billionaire John Magnier, Maurice Regan finally got his right of reply. “When people take cheap shots, it’s hurtful,”  the construction magnate told the High Court. Why would Paul Gallagher, Magnier’s senior counsel and a former attorney general on two occasions, say “mean things” and take a “cheap shot at someone like me” — someone he doesn’t know, he continued. He has been in business for over 30 years, has a young family, and the comments about him would be in…