Prince William and Queen Camilla’s once fractured relationship relationship has evolved over the years, and Kate Middleton might be the person to thank for the Prince of Wales’ change of heart. According to an insider, Camilla and William have “come a long way.” The source credited the Prince of Wales’ “change of heart” to the Princess of Wales being “accepting of Camilla” years before the other royals embraced the queen consort. Before Princess Diana passed, she branded Camilla as the third person in her marriage to King Charles — so due to Camilla and Diana’s history, William and Prince Harr…