Is there a TestInsertSvgs command to supplement TestDumpSvgs?

I made a folder (on my desktop) with all icons for RhinoWIP with the TestDumpSvgs command and wanted to do some changes to test, but could not find a command to read them back in.

And what about the dark mode icons, do I need to change the color scheme and dump them again?

Thanks.

I chose to continue the discussion over here instead:

that doesn’t have any effect currently.