The heir to turn-of-the-century tycoon Andrew Mellon’s family fortune plunked down $50 million to former President Donald Trump’s super PAC. Timothy Mellon’s gifted windfall to Make America Great Again Inc. came a day after Trump infamously was found guilty of committing 34 counts of falsifying business records by a New York City jury, according to The New York Times. The donation stands as one of the largest contributions contributions ever disclosed. The donation is a massive infusion to a group that boasted $34.5 million in assets at the end of April and is responsible for the estimated $70…