With homosexual and transgender issues always at the forefront, whether we like it or not, it's a relief to know that now your kids will have a gender-fluid option for this coming Halloween: Halloween probably isn’t the best time to deal with an incredibly sensitive subject like gender reassignment. But that hasn’t deterred a major company from conjuring up a Caitlyn Jenner costume in time for Oct. 31. Spirit Halloween, the company behind the pop-up costume stores that appear all over the city every fall, has exclusively confirmed to Confidenti@l that it will be carrying the insensitive getup this year....