(Reuters) – Madonna sold an abstract painting by French artist Fernand Leger for $7.16 million on Tuesday to raise funds for girls' education projects in Afghanistan, Pakistan and elsewhere. The 1921 painting, "Trois Femmes a la Table Rouge," which carried a pre-sale estimate of up to $7 million, was purchased by an unidentified buyer at Sotheby's Impressionist and Modern Art sale in New York, according to the auction house's website. …