Former late-night host Jay Leno has filed for conservatorship of his wife, Mavis, as she has reportedly been diagnosed with Alzheimer’s disease, RadarOnline.com has learned. According to TMZ, Leno submitted legal documents on Friday, January 26, to become the conservator of Mavis’ estate. Sources close to the couple revealed that Mavis suffers from Alzheimer’s, a progressive disease that affects memory and other cognitive functions. This heartbreaking news has prompted Leno to take legal action to ensure the proper care and management of his wife’s affairs. Leno, 73, and his wife, 77, have bee…