Kate Middleton is using the power of fashion to send a message to her in-laws! The Princess of Wales sported a blue Alexander McQueen ensemble during the royal Christmas walk at Sandringham, and fashion experts saw her attire as a way to avoid discussing Meghan Markle and Prince Harry’s noticeable absence. “The royals wear looks strategically. It is part of their role to not offend the King, the institution, the country or the company that they’re hosting or being hosted,” Jennifer Von Walderdorff told GB News. The Princess of Wales is often praised for her garments, and she participates in fl…