By Greta Rosen Fondahn STOCKHOLM (Reuters) -Electrolux's profit more than doubled in the third quarter, driven by a recovery in its North American business and as it mostly managed costs related to U.S. tariffs, sending its shares up sharply. The Swedish home appliance maker said its North American business, which struggled for years with high costs, underperformance at its factories and tough competition, gained market share in the quarter. Its shares were 15% higher at 0837 GMT on track for their bigg ...