By Alan Charlish and Anna Koper WARSAW (Reuters) -A top Polish court moved on Monday to block the dismissal of a senior prosecutor accused of taking part in politicizing of the country’s legal system, underlining the challenges the government faces delivering reforms needed to get EU funds. Critics say the overhaul implemented by the previous nationalist Law and Justice (PiS) administration increased political influence over the courts, and as a result Brussels froze billions of euros earmarked for Poland due to rule-of-law concerns. Warsaw’s new pro-European government has vowed to roll back …