title: Textformfield selection controls in flutter
body: <p>This image shows flutter app selection controls
  <a href="https://i.stack.imgur.com/471BD.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/471BD.jpg" alt="img" /></a></p>
  <p>But I want selection controls like Gmail.
  <a href="https://i.stack.imgur.com/5jQ1x.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5jQ1x.gif" alt="Gmail selection control" /></a>
  How can I made it.</p>