get proper iconography in the map

[vecna]

At the moment the map display this image in every analyzed location: https://github.com/tracking-exposed/krgotrex/blob/master/site/assets/img/fist-pin.png

This is a temporary situation: we should display this icon only in location which are actually Google-free.
About all the other location, we can (what comes simpler)

1. make a colored circlet
2. put an icon
3. put a selected icon among few, which express the amount of trackers present in the website

I would suggest to start with the 1, but if @bnvk has a suggestion, considering years ago worked on icon-set, let us know!

[vecna]

Thanks for your update, I merged the fix in master. I'll keep this issue open to get some feedback from @bnvk