Communicate when symbolic doesn't recolor because "-symbolic" suffix is missing
When opening a symbolic icon that is perfectly valid but missing the "-symbolic" suffix, it doesn't recolor. This makes sense since we want to realistically preview how it would look in GTK, and the suffix is needed for that. However, we should give better feedback as to why it's not working.
One potential solution could be having an in-app notification or infobar saying something like The icon is not recoloring because the file name needs to end in "-symbolic"
. We could even have a button to automatically rename it.