By Simon Johnson and Stine Jacobsen STOCKHOLM (Reuters) -Sweden’s central bank said on Friday it had appointed the head of the national financial regulator Erik Thedeen as its new chief, ending speculation as to who would replace long-serving Governor Stefan Ingves when he leaves at the end of the year. With the war in Ukraine dragging on and no sign of inflation easing, Thedeen will have a tricky job in balancing policy tightening against the risk of an economic slowdown. Ingves has led the Riksbank since 2006, while Thedeen has worked at the Ministry of Finance, headed the Nasdaq Stockholm e…