fixed comment

deltachat-ios/Controller/QrPageController.swift

@@ -31,9 +31,10 @@ class QrPageController: UIPageViewController, ProgressAlertHandler {
     // MARK: - lifecycle
     override func viewDidLoad() {
         super.viewDidLoad()
+        
+        // temp fix - ToDo: check if this is needed for >iOS13 devices
         if #available(iOS 13, *) {}
         else {
-            // temp fix - ToDo: check if this is needed for >iOS13 devices 
             self.view.backgroundColor = .white
         }
         dataSource = self