Allow tapping anywhere on verification code view to make first responder

Signal/src/ViewControllers/Registration/RegistrationVerificationCodeView.swift

@@ -140,6 +140,8 @@ class RegistrationVerificationCodeView: UIView {
         self.addSubview(textfield)
 
         updateColors()
+
+        addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(didTapView)))
     }
 
     public func updateColors() {
@@ -202,6 +204,11 @@ class RegistrationVerificationCodeView: UIView {
         textfield.selectedTextRange = textfield.textRange(from: newPosition, to: newPosition)
     }
 
+    @objc
+    private func didTapView() {
+        becomeFirstResponder()
+    }
+
     @discardableResult
     public override func becomeFirstResponder() -> Bool {
         return textfield.becomeFirstResponder()

Signal/src/ViewControllers/Registration/RegistrationVerificationViewController.swift

@@ -214,11 +214,7 @@ class RegistrationVerificationViewController: OWSViewController {
     public override func viewDidAppear(_ animated: Bool) {
         super.viewDidAppear(animated)
 
-        if !UIDevice.current.isIPhone5OrShorter {
-            // Small devices may obscure parts of the UI behind the keyboard, especially with larger
-            // font sizes.
-            verificationCodeView.becomeFirstResponder()
-        }
+        verificationCodeView.becomeFirstResponder()
 
         showValidationErrorUiIfNecessary()