Fix navbar layout in share extension.

SignalMessaging/Views/OWSNavigationBar.swift

@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
+//  Copyright (c) 2019 Open Whisper Systems. All rights reserved.
 //
 
 import Foundation
@@ -156,11 +156,13 @@ public class OWSNavigationBar: UINavigationBar {
     }
 
     public override func layoutSubviews() {
-        if CurrentAppContext().isMainApp {
+        guard CurrentAppContext().isMainApp else {
-            guard OWSWindowManager.shared().hasCall() else {
+            super.layoutSubviews()
-                super.layoutSubviews()
+            return
-                return
+        }
-            }
+        guard OWSWindowManager.shared().hasCall() else {
+            super.layoutSubviews()
+            return
         }
 
         guard #available(iOS 11, *) else {