title: Clear button NOT showing on UITextField
body: <p>I'm facing a problem while trying to enable the clear button on UITextField.
  I have added like this:</p>
  
  <pre><code>if let clearButton = searchTextField.value(forKeyPath: "_clearButton") as? UIButton { //KV
      clearButton.tintColor = .nextWhite()
      clearButton.backgroundColor = .nextWhite()
      clearButton.setImage(UIImage(named: R.image.iconCloseRounded.name), for: .normal)
      clearButton.isHidden = false
  </code></pre>
  
  <p>The debug 3d image is attached on the link below.</p>
  
  <p>Please, could anyone see where I'm adding this wrong that it's not being shown?</p>
  
  <p><img src="https://i.stack.imgur.com/wRgO6.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/TAko5.png" alt="enter image description here"></p>