Future First Lady Melania Trump and son Barron will not be moving to the White House after Donald Trump’s inauguration in January, The Post has learned. The president-elect’s 46-year-old wife and their 10-year-old son are staying put at the family’s glitzy Trump Tower penthouse so that Barron can continue attending his Upper West Side private school, sources told The Post. “Melania is extremely close to Barron, and they have become closer during the campaign,” said a source close to Trump’s transition team. “The campaign has been difficult for Barron, and she is really hoping to keep disruption to a minimum.”...