Jenelle Evans has a positive update about her son! As we’re sure you know, Jace Evans was just 16 when he had a very deeply unsettling incident with his mental health. He was placed in a mental health facility after his grandmother Barbara called the police, and ever since then we’ve been getting sparse updates as he healed. On Wednesday, as reported by The Ashley’s Reality Roundup, the now 17-year-old had made his first post to Instagram in a v…