fix(ios): only open a URL when the application is active (#3382)

Co-authored-by: Ian Keith <iankeith@gmail.com>

Author: imhoffd

ios/Capacitor/Capacitor/CAPBridgeViewController.swift

@@ -260,7 +260,9 @@ public class CAPBridgeViewController: UIViewController, CAPBridgeDelegate, WKScr
     }
 
     if navUrl.absoluteString.range(of: hostname!) == nil && (navigationAction.targetFrame == nil || (navigationAction.targetFrame?.isMainFrame)!) {
-      UIApplication.shared.open(navUrl, options: [:], completionHandler: nil)
+      if UIApplication.shared.applicationState == .active {
+        UIApplication.shared.open(navUrl, options: [:], completionHandler: nil)
+      }
       decisionHandler(.cancel)
       return
     }