Clint Eastwood’s 27-year-old daughter Morgan honored her father’s late partner, Christina Sandera, in an emotional social media post, RadarOnline.com can reveal. Morgan called Sandera’s unexpected passing at age 61 a “devastating loss”. On Sunday, June 21, Morgan took to Instagram and shared a group photo from her wedding day to her stories. The photo featured Morgan in her wedding dress beside husband Tanner Koopmans. The Oscar-winner stood by his daughter’s side and smiled, while Sandera stood next to the groom. Morgan wrote a note over the photo, remarking: “A devastating loss for our whole…