Facebook finally started adding 'reply' buttons to comments[ Tue, 26 Mar 2013 14:00:15 GMT ]Keeping track of conversations in Facebook comments can be challenging. Everything's in a straight line and there's no indication which person is replying to which comment. Well, no more of that! Facebook's starting to add "reply" buttons to individual comments and grouping them accordingly.Additionally, "the most active and engaging conversations [...] will be surfaced at the top" of posts, Vadim...