Save all layers in once to one svg

[svenhb]

Can you add the possibility to save all layers in one go to one svg file?
Perhaps each layer to it's own "g" element with layer's id: <g id="layer1" ... and additionally same ID for the path element.
Then post-processing in my program would be much easier (https://github.com/svenhb/GRBL-Plotter).

Application idea: create layered papercuts in Paint.Net, export to SVG and laser-cut with GRBL-Plotter.
Example:

example pdn.zip