King Charles III and Kate Middleton have continued to support each other as they deal with their respective health issues, RadarOnline.com has learned. When both royals were at the London Clinic, where the 75-year-old king was being treated for an enlarged prostate and the 42-year-old Princess of Wales underwent abdominal surgery in January, Charles was seen “toddling” down the hospital hallway in a robe to visit his daughter-in-law. “When they were in hospital together there was a lot of toddling down the corridor to spend time with her. He has been encouraging and supporting her throughout,”…