title: I want to make TextField scrollable in both horizontal & vertical direction
body: <p>I want the ability to scroll multiline TextField in both horizontal or vertical direction. Currently, the Scrollable widget used by EditableText only allows scrolling in one direction i.e AxisDirection.down when multiline. My problem is it wraps overflowing text which is understandable but I want to scroll not wrap text.</p>
  
  <p>I've tried <a href="https://pub.dev/packages/diagonal_scrollview" rel="nofollow noreferrer">diagonal_scrollview</a> but it doesn't work for TextField properly. Is there another way to achieve this effect?</p>
  
  <p>My Screen layout looks like this:
  <img src="https://user-images.githubusercontent.com/33719927/78456040-35b35e00-76bf-11ea-947b-e743bf0a5955.png" alt="flutter_02">
  The Layout is roughly like:
  Scaffold -> <em>body:</em> NestedScrollView <em>body:</em> MyCustomTextField -> Column[ConstrainedBox -> ListView.builder, Expanded -> <strong>EditableText</strong>]</p>