Fixer Upper‘s Joanna Gaines and Chip Gaines unpacked their conflicting emotions of sending daughter Ella Gaines, 18, off to college this year. Joanna Gaines is fixing up her emotions as she prepares for another one of her kids to head off to college. The Fixer Upper star—who shares Drake, 20, Ella, 18, Duke, 17, Emmie, 15, and Crew, 7, with husband Chip…