The big winner of UCLA’s spring football game was anyone looking for signs of life in the program. A year ago, the team held what was dubbed a spring showcase before a smattering of fans. It was a glorified practice, with quarterback Nico Iamaleava watching in sunglasses and a designer T-shirt after having recently transferred from Tennessee. This was something else entirely. UCLA wide receiver Semaj Morgan (4) looks for running room during the spring game Saturday at the Rose Bowl. UCLA Athletics On a warm, sunny Saturday afternoon at the Rose Bowl, there were trick plays galore — including a flea-flicker from Iamaleava and a William “Refrigerator” Perry-style run involving 330-pound offensive lineman Mike McDonald — during a real spring game before an enthusiastic crowd of about 10,000. In a display high on energy but low on offensive highlights under new coach Bob Chesney , the Blue team held on for a 24-17 victory over the White.…