By Kati Chitrakorn, CNN (CNN) — Twenty-four years since actor Renée Zellweger first appeared in the film adaptation of Helen Fielding’s literary bestseller “Bridget Jones’s Diary,” she’s back for her fourth turn as an endearing, klutzy character looking for love. Although this time, in “Bridget Jones: Mad About the Boy,” she’s no longer a carefree young woman, but a widow in her 50s, with two kids. Jones’s personal style — a quirky, at times ill…