fix empty state view layout in chats

deltachat-ios/Chat/ChatViewControllerNew.swift

@@ -163,6 +163,7 @@ class ChatViewControllerNew: UITableViewController {
         emptyStateView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 40).isActive = true
         emptyStateView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -40).isActive = true
         emptyStateView.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor).isActive = true
+        emptyStateView.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor).isActive = true
     }
 
     override func viewWillAppear(_ animated: Bool) {