A French court has convicted Congolese activist Mwazulu Diyabanza of aggravated robbery and fined him 1,000 euros ($1,176) after he snatched a 19th century central African funerary post from a Paris museum in June. Diyabanza, who has lived in France for 20 years, belongs to a pan-African movement that is pressing France to return thousands of art works removed from its African colonies and make reparations for acts of slavery. He told Reuters he would lodge an appeal. "It's a big joke from French justice", Diyabanza said. "We will appeal to show elements that the judge has obviously missed," he…