Media stocks popped Thursday as Roku’s 30% rally lifted the entire sector. Wall Street celebrated the streaming device company’s third-quarter report Wednesday, in which Roku reported strong trends in content distribution and advertising as well as uptake of its Roku-branded TVs. Paramount and Warner Bros. Discovery both closed up about 10% Thursday. Disney shares closed up nearly 3% following news of the media giant’s agreement to buy Comcast’s remaining stake in Hulu. Netflix and Comcast bo...