Heather Mack and her mother were all smiles in August 2014 as they posed for a photograph in the first-class cabin on a flight to Indonesia, a trip that was supposed to rekindle their fractured relationship. Five days later, Sheila Von Wiese Mack was found murdered and stuffed in a suitcase at the Bali resort where they’d been staying, the victim of a “vicious” and premediated plot by her daughter and her daughter’s boyfriend to kill her and live lavishly off the inheritance, federal prosecutors say. Now, a decade after the gruesome crime, which sparked international media attention and led po…