As London Fashion Week wrapped up to make way for the women's ready-to-wear shows in Milan, Mulberry showed one of the final denim-heavy collections coming down the London runway. Seen only in the menswear collection, the denim itself didn't stand out so much for innovation, but for rather how it was styled. For the umpteenth time this season, in NY and London, men's jeans have been tucked into punk/combat boots. Do we detect a trend emerging…