Every week, Fangirlish writers will be discussing new episodes of Supergirl and sharing their thoughts, feelings, and speculation about the hour’s hot topics in a little something we like to call Fangirlish Roundtables. Today, we’re breaking down the penultimate episode (1×19) of Supergirl, “Myriad” where we discuss Kara’s moral dilemma, whether we believe J’Onn J’Onzz…