NEW YORK — Slain Officer Wilbert Mora was remembered Wednesday at an emotional St. Patrick’s Cathedral funeral as a man whose big heart could not be stilled by a killer’s bullet. The 27-year-old Mora was posthumously promoted to Detective First Grade as tears flowed inside the Midtown house of worship, where family members and New York Police Department colleagues recalled his final act as a cop: Donating his heart and four other organs to five anonymous recipients. “They will hear the heartbeat of a hero,” said NYPD union head Patrick Lynch in his eulogy. “Know now your son has given renewed …