Clare Bowen penned a heartfelt tribute to former Nashville costar Hayden Panettiere just days after her death at age 36. “It’s been raining in the treehouse for days.. for you.. you whispered like you’d found the sun, just in June,” Bowen, 42, wrote via Instagram on Wednesday, August 19, alongside several black-and-white photos of the pair. “But you always were full of surprises and dreams pulling at threads and the lines in between.” The actress’ tribute to Panettiere resembled lyrics from a song or poem, shining a light on their longtime friendship. “So for now.. I’ll rem...