src/vs/editor/contrib/dnd/dnd.ts/DragAndDropController/_onEditorMouseUp
class DragAndDropController:	private _onEditorMouseUp(mouseEvent: IEditorMouseEvent): void {
		this._mouseDown = false;
		// Whenever users release the mouse, the drag and drop operation should finish and the cursor should revert to text.
		this._editor.updateOptions({
			mouseStyle: 'text'
		});
	}