Replaces screen edge gesture hack with preferredScreenEdgesDeferringSystemGestures

We want priority over system gestures when tapping near edges of screen. Previously, we needed to access the private screen edge gesture recognizer, but now we can use preferredScreenEdgesDeferringSystemGestures.

Delta/AppDelegate.swift

@@ -33,12 +33,6 @@ class AppDelegate: UIResponder, UIApplicationDelegate
         
         self.configureAppearance()
         
-        // Disable system gestures that delay touches on left edge of screen
-        for gestureRecognizer in self.window?.gestureRecognizers ?? [] where NSStringFromClass(type(of: gestureRecognizer)).contains("GateGesture")
-        {
-            gestureRecognizer.delaysTouchesBegan = false
-        }
-        
         // Controllers
         ExternalGameControllerManager.shared.startMonitoring()
         

Delta/Emulation/GameViewController.swift

@@ -131,6 +131,10 @@ class GameViewController: DeltaCore.GameViewController
         return !self.isGyroActive
     }
     
+    override var preferredScreenEdgesDeferringSystemGestures: UIRectEdge {
+        return .all
+    }
+    
     required init()
     {
         super.init()

Delta/Launch/LaunchViewController.swift

@@ -34,6 +34,10 @@ class LaunchViewController: RSTLaunchViewController
         return self.gameViewController
     }
     
+    override var childForScreenEdgesDeferringSystemGestures: UIViewController? {
+        return self.gameViewController
+    }
+    
     override var shouldAutorotate: Bool {
         return self.gameViewController?.shouldAutorotate ?? true
     }