latest label that was just added before Margaret Mitchell’s 1936 novel “Gone With The Wind.”It says that the old book, which was made into a huge 1939 movie, amounts to a “romanticization of a shocking era in our history and the horrors of slavery.” Um, duh! It’s a Civil War story that’s pro-Confederacy.A more useful trigger warning I’d throw in front of “Gone With The Wind,” however, is: “This book is 1,472 pages long.” In fact, books, movies and TV shows almost never begin with a trigger warning that could actually help me make a decision. Here are some I’d like to see.Trigger Warning: You will never be able to afford this beautiful homeEvery flippin’ Nancy Meyers movie (“It’s Complicated,” “Something’s Gotta Give,” “The Holiday”) has a stunningly gorgeous Hamptons or California home where wealthy, relaxed Ina Garten-types drink red wine on beige couches that miraculously never stain.