title: TextInputAction.done not showing "Done" button in iOS
body: <p><strong>Code:</strong></p>
  
  <pre><code>TextField(
    keyboardType: TextInputType.number,
    textInputAction: TextInputAction.done,
  )
  </code></pre>
  
  <hr>
  
  <p><strong>Current screenshot:</strong></p>
  
  <p><a href="https://i.stack.imgur.com/ZrQ2i.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZrQ2i.png" alt="enter image description here"></a></p>
  
  <hr>
  
  <p><strong>Expected screenshot:</strong></p>
  
  <p><a href="https://i.stack.imgur.com/dIzXr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dIzXr.png" alt="enter image description here"></a></p>