Currently, if I have at least one issuer grouped under a country, when I choose 'show countries: from which I don't have any coins', it will automatically hide everything.
For example, I have a coin from Oman and don't have any coins from Muscat and Oman. When I choose 'show countries: from which I don't have any coins', both would disappear from the list.
My suggestion is to show all countries and issuers that are missing when choosing 'show countries: from which I don't have any coins' and not only the top level countries as it's done now.
Greetings all. I noticed this topic hadn't been formally accepted or rejected, probably because it has been such an unusual year.
I don't know enough about programming to know if this is a simple thing or an ordeal, but I figured I could at least comment to make the suggestion visible again (assuming commenting still brings things up to the current page).