Move modal logic to contained VC

ContextMenu/ClippedContainerViewController.swift

@@ -13,7 +13,7 @@ class ClippedContainerViewController: UIViewController {
     let viewController: UIViewController
 
     private let options: ContextMenu.Options
-    private let containedViewController: UINavigationController
+    private let containedViewController: ModalNavigationViewController
 
     override var preferredStatusBarStyle: UIStatusBarStyle {
         return viewController.preferredStatusBarStyle
@@ -22,7 +22,7 @@ class ClippedContainerViewController: UIViewController {
     init(options: ContextMenu.Options, viewController: UIViewController) {
         self.viewController = viewController
         self.options = options
-        self.containedViewController = UINavigationController(rootViewController: viewController)
+        self.containedViewController = ModalNavigationViewController(rootViewController: viewController)
         super.init(nibName: nil, bundle: nil)
         self.containedViewController.delegate = self
     }

ModalNavigationViewController.swift

@@ -0,0 +1,20 @@
+//
+//  ModalNavigationViewController.swift
+//  ContextMenu
+//
+//  Created by Bas Broek on 01/04/2019.
+//
+
+import UIKit
+
+class ModalNavigationViewController: UINavigationController {
+    override var accessibilityViewIsModal: Bool {
+        get { return true }
+        set {}
+    }
+
+    override func accessibilityPerformEscape() -> Bool {
+        dismiss(animated: UIAccessibility.isReduceMotionEnabled == false)
+        return true
+    }
+}