CEP extension and SVG panel icons

Hello,

I am making my first CEP extenstion for Illustrator. It shows a palette, I'd like it to have a custom icon when minimized. When I put  <Icons><Icon Type="Normal">./icons/myicon.png</Icon></Icons> into manifest.xml, it works. But when I attempt to use a SVG icon, it is silently ignored. Are SVG icons supported for CEP palettes? I have developed a dozen of C++ plugins, and there SVG has been the preferred format for icons for years. Even https://github.com/Adobe-CEP/CEP-Resources/tree/master/CEP_11.x/Documentation doesn't mention SVG, so are they really not supported?

 -- Jan