message: making the same update in the schema updator component
diff: draggable="true"
  {{on "mousedown" (action this.beginDragging field)}}
  {{on "dragend" (action (mut this.isDragging) false)}}
  + {{on "dragstart" (action this.firefoxDrag)}}
  data-test-card-add-field-draggable={{field.type}}
  >
  {{! template-lint-disable no-inline-styles}}
  