By Justyna Pawlak WARSAW (Reuters) – An outpouring of public support across Europe for millions of people fleeing war in Ukraine may point to a shift in attitudes towards refugees as the number of those displaced by conflict or persecution globally has surpassed 100 million, the UNHCR said. “We are very encouraged,” Gillian Triggs, the U.N. refugee agency’s assistant high commissioner for protection said in a Reuters Newsmaker interview. More than 6.5 million people have left since Russia invaded Ukraine nearly four months ago, many finding accommodation in private homes or hotels, as well as …