We were producing org.symbolic.png from org.gnome.Recipes-symbolic.svg,
which is not useful. Look for the last dot in the original name, to
produce the expected org.gnome.Recipes-symbolic.symbolic.png instead.
add circle objects to the injected style for recoloring.
Should avoid randomly colored symbolic icon bits when circles are
in the mix as in network-vpn-acquiring-symbolic for example.