WASHINGTON — The Supreme Court on Thursday gave whiskey maker Jack Daniel’s reason to raise a glass, handing the company a new chance to win a trademark dispute with the makers of the Bad Spaniels dog toy.In announcing the decision for a unanimous court, Justice Elena Kagan was in an unusually playful mood. Observers who watched her read a summary of the opinion in the courtroom said at one point she held up the toy, which squeaks and mimics the whiskey’s signature bottle.Kagan said a lower court’s …