The GM had a noticeable shift in tone following the trade deadline. That could mean a whole lot of changes coming to Birdland this winter. According to Orioles’ GM Mike Elias, the team is about to enter into a “decade-long window” of winning. It’s the type of comment that some will take as bloviating to cover up for a trade deadline in which Elias chose to sell rather than supplement the best Orioles team in six years. But others that have fully embraced Elias’ vision for the club will view it as a shift in tone that indicates changes on…