I’m using the same snippet of code to add svg support to my site, and it mostly works, except not for the featured image post thumbnail.
I can upload svg via the media uploader, I can insert svg into a post via the add media button from within the post editor, but when I try to set the featured image from within the post editor, the svg does not show up in the media library.
In this scenario, it sort of defeats the benefit of using SVG if I have to generate a separate image for the post thumbnail.
