Bowing to the Obama administration, a federal appeals court Monday gutted its own decision that had dramatically narrowed the government’s search-and-seizure powers in the digital age. The 9-2 ruling by the 9th U.S. Circuit Court of Appeals nullifies Miranda-style guidelines the court promulgated last year that were designed to protect Fourth Amendment privacy rights during court-authorized computer searches. Supreme Court Justice Elena Kagan, as solicitor general last year, had urged the court to reverse itself amid complaints that federal prosecutions were being complicated, and computer searches were grinding to a halt, because of the detailed guidelines…