Add close button to site credential controller

Author: itsmeichigo

WordPressAuthenticator/Authenticator/WordPressAuthenticator.swift

@@ -242,9 +242,6 @@ import WordPressKit
         let loginFields = LoginFields()
         loginFields.siteAddress = siteURL
         controller.loginFields = loginFields
-        controller.dismissBlock = { _ in
-            controller.navigationController?.dismiss(animated: true)
-        }
 
         let navController = LoginNavigationController(rootViewController: controller)
         navController.modalPresentationStyle = .fullScreen

WordPressAuthenticator/Unified Auth/View Related/Site Address/SiteCredentialsViewController.swift

@@ -58,6 +58,9 @@ final class SiteCredentialsViewController: LoginViewController {
         loginFields.meta.userIsDotCom = false
 
         navigationItem.title = WordPressAuthenticator.shared.displayStrings.logInTitle
+        if completionHandler != nil {
+            navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .close, target: self, action: #selector(dismissView))
+        }
         styleNavigationBar(forUnified: true)
 
         // Store default margin, and size table for the view.
@@ -233,6 +236,9 @@ extension SiteCredentialsViewController: UITextFieldDelegate {
 // MARK: - Private Methods
 private extension SiteCredentialsViewController {
 
+    @objc func dismissView() {
+        navigationController?.dismiss(animated: true)
+    }
     /// Registers all of the available TableViewCells.
     ///
     func registerTableViewCells() {