fixing the xhr req chain for selecting a challenge
fixing the xhr req chain for selecting a challenge

mvexel/maproulette,mvexel/maproulette,osmlab/maproulette,mvexel/maproulette,Crashfreak/maproulette,mvexel/mr-tnav,Crashfreak/maproulette,osmlab/maproulette,Crashfreak/maproulette,mvexel/mr-tnav,osmlab/maproulette,Crashfreak/maproulette,mvexel/maproulette,osmlab/maproulette