It would be nice to have some kind of GUI opened by placing a "+" button (see figure) where you can add a SVG to the Custom Icons file. Instead of trying to add the correct syntax into a custom_icons.svg file. Also to reduce the need for manual labour to edit the custom_icons.svg file

I have the problem that not all icons from Google Material Symbols are available which I want to use. Therefore I need to add them manually each time.