GTK Inspector documentation
Would be great to have a page describing how to use the GTK Inspector.
It's currently mentioned on https://developer.gnome.org/hig/resources.html#demo-apps-toolkit which points to the outdated https://wiki.gnome.org/Projects/GTK/Inspector
https://blog.gtk.org/2017/04/05/the-gtk-inspector/ is a good introduction. @feaneron would you agree that we update it and publish it on developer.gnome.org (under CC-BY-SA) ?