You'd think it's bridal season with all the long white dresses out and about, but these white-hot statements are this fall's greatest hallmarks. They look especially fresh when partnered with boyish extras (i.e., structured blazers, utilitarian sneakers) and functional, chill-proof layers. I'm a fan of this trend, because these dresses are wearable year-round, and head-to-toe white always looks clean and elegant. I'm in love with these iterations by Capulet, Spell, Tibi, Veronica Beard, Maje…