Create Map Popup for Point of Interest

[HerzogVonWiesel]

As a user, I want to find information about POI at the HPI quickly.

For this, it would be great to have a pinpoint (similar to the waypoints shown when navigating, only in grey) at the POIs location on the map, to quickly know where it is located, and get information about it when tapping on it, as if I would have tapped the "show on map" button for the POI.