DUBAI (Reuters) - groups placed on a terrorism list by the United Arab Emirates can appeal against the designation if their "approach has changed", a senior UAE official said on Thursday, after several organizations criticized their inclusion. The Gulf Arab state last week designated the Muslim Brotherhood and its local affiliates, as well as Syria-based Nusra Front and the Islamic State, and Shi'ite militant groups such as the Houthi movement in Yemen as terrorist organizations. ...