Allows title to be empty when setting nil
Allows title to be empty when setting nil

macoscope/DZNWebViewController,imjerrybao/DZNWebViewController,imjerrybao/DZNWebViewController,Pitometsu/CruiserWebViewController,Pitometsu/CruiserWebViewController,dzenbot/DZNWebViewController,Pitometsu/CruiserWebViewController,imjerrybao/DZNWebViewController,imjerrybao/DZNWebViewController,iorikingdom/DZNWebViewController,imjerrybao/DZNWebViewController,Pitometsu/CruiserWebViewController,RobotsAndPencils/DZNWebViewController,GaoZhenWei/CruiserWebViewController