As far as homecomings go, it was about as much of an unceremonious one as it could be for Jim Montgomery returning to Boston for the first time.He did have a number of people from the Winchester community, where he lived in during his Boston Bruins tenure, make it out to TD Garden for Thursday night’s game, but they watched his St. Louis Blues get outclassed by his former B’s group in a 5-2 decision. The win for the Black and Gold pushed Boston all the way up to second in the Atlantic Division behind the Tampa Bay Lighting, and it also dropped the Blues to within a single point of the basement in the Central Division.