Shares of Sweetgreen (SG 28.81%) popped Friday morning after the fast-casual salad specialist posted strong results in its fourth-quarter report.The company beat revenue estimates, made progress on the bottom line, and offered first-quarter guidance that was better than the analysts' consensus view. As of noon ET, the stock was up 30.3%. Sweetgreen stock gets more appetizingIn Q4, Sweetgreen's revenue jumped 29% to $153 million. That growth was primarily driven by new restaurant openings, as same-store sale ...