By Joice Alves LONDON (Reuters) – The euro steadied on Friday following Thursday’s sharp declines after Russia’s all-out invasion of Ukraine unleashed the biggest attack on an European state since World War Too. The dollar flattened against most currencies as markets walked back some of the tumultuous moves from the previous day. Russia’s rouble also recovered some ground, trading at around 82.8 per dollar, having hit a record low of 89.986 per dollar the day before. “FX markets are slightly calmer this morning as the world tries to come to terms with war in Europe,” said Chris Turner Global H…