Decide if and how we should support SVGs on the Nav Icon

https://www.drupal.org/project/svg_image →
discovery: svg image does not attempt to apply an image style to an svg, it recognises that is can not and only renders an IMG tag with a sanitized file that it makes during file upload phase. this is where an SVG would then be 'sanitaized' and the user would need to very the image still 'works as expected' (given they may not have any knowledge of this sanitzationg does..).

Definitely a good idea for 📌 Decide strategy to customize or provide 1st level menu items' icons Active .