`EditableText` doesn't release input focus

[nate-thegrate]

I'm not sure if this is an issue on the Flutter or DartPad side.

Description

It's not possible to edit the code if an EditableText widget has focus.

Steps to reproduce

1. Create a Flutter app with a TextField/CupertinoTextField (or load a TextField demo).
2. Click on the text field.
3. Then try to edit the code.

import 'package:flutter/material.dart';

void main() {
  runApp(
    const MaterialApp(
      home: Scaffold(
        body: Center(child: TextField()),
      ),
    ),
  );
}

(Google Chrome, Windows 11)

[johnpryan]

Related to #3251