By Robert Muller, Jan Lopatka and James Mackenzie PRAGUE/KYIV (Reuters) – When headlines flashed on Tuesday morning that the leaders of Poland, the Czech Republic and Slovenia were on a train to Kyiv for talks with the Ukrainian president, it was news to some members of their immediate families. The trip to a city under siege, where Ukraine’s military is fighting invading Russian forces just a few kilometres from the periphery, was hastily arranged and known only to a few people. Public pronouncements by the leaders and by a participant and a diplomatic source who spoke privately point to an a…