One year on from the Lion Air plane crash that killed 189 people, relatives and friends of victims held prayer vigils and cast flower petals into the Java Sea at the site where the Indonesian budget carrier’s Boeing 737 MAX jet disappeared beneath the waves.The almost new Boeing aircraft had been flying from Jakarta to the town of Pangkal Pinang, on the Bangka-Belitung islands off Sumatra, when it crashed, just minutes after take-off.Tuesday’s commemoration came days after Indonesian…