A last-ditch effort by parks advocates to halt the construction of the Obama Presidential Center in Jackson Park was blocked because the agencies involved had no obligation to consider alternative locations and the group’s other arguments were unlikely to succeed, a federal court held.The 7th Circuit U.S. Court of Appeals issued a unanimous ruling Thursday explaining why the plaintiff Protect Our Parks Inc., claims did not meet the standards for a federal injunction pending appeal, noting it is an “extraordinary remedy …