When a mother and daughter boarded their plane home in 2019, they were greeted with their seating area covered in vomit, authorities said. An argument between the flight attendant and passenger over who should be responsible to clean the vomit ended with the woman filing a lawsuit against Frontier Airlines. Almost three years later, the lawsuit has been settled. Rosetta Swinney, from Durham, North Carolina, filed a lawsuit in 2019 against Frontier Airlines after she and her 14-year-old daughter boarded a flight returning to Raleigh from Las Vegas, authorities said. The woman’s attorney and Fro…