There is not, nor there seem to be in the roadmap at least for this, but since hamburger menus are now much simpler that they have no longer built-in animations (due to a bug fix) they could be easily replaceable with a lightbox to just do the same function. Lightboxes –unlike hamburgers– can vary and can be triggered by different elements each or located in different pages; and the vector art for the menu button is available at the Shapes menu in the Media Manager. I know it’s just a #workaround but you wouldn’t note much difference, hope it helps