[Feature Request] Categorize groups by games and filter map view

Currently, in the map view, all public groups are visible for everyone. As such, people who have no interest in, say, Harry Potter, still have to see and search through those groups in the map view.
It would be awesome if the group Admins could specify that a group is mainly for X Niantic game. With a filter for the map, this would reduce clutter significantly and allow players to find the groups for the games they actually play much easier.
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