message: Fix YAML save/cancel on IE11
  IE11 doesn't support DOMNode.remove(). Use parentNode.removeChild() instead.
diff: @@ -88,7 +88,8 @@ export const EditYAML = connect(stateToProps)(
  super.componentWillUnmount();
  if (this.ace) {
  this.ace.destroy();
  - this.ace.container.remove();
  + // Avoid the use of .remove() to be compatible with IE 11
  + this.ace.container.parentNode.removeChild(this.ace.container);
  this.ace = null;
  window.ace = null;
  }
  