By Mike Collett COSTA DO SAUIPE, Brazil, Dec 5 (Reuters) - FIFA is working to improve the rights of workers in Qatar but everyone needs to "calm down" about the problems surrounding the 2022 World Cup, the world soccer body's president Sepp Blatter said on Thursday. A decision on whether the tournament will be moved from the steaming summer months to the winter months in nine years' time has been postponed by FIFA until after next year's World Cup finals in Brazil. Alleged abuses of the rights of migrant workers employed on World Cup projects have made frequent headlines this year but a spokesman for the International Trades Union Confederation said this week that conditions had still not improved. Blatter said FIFA could not absolve itself from its responsibilities regarding the problems in the Gulf state, but the time had come for cool heads to deal with the heated situation. More...