Geolocation widget improvement

This issue is about a possible improvement of the geolocation widget by using the location-arrow FontAwesome icon rather than the current one (see reference below). This is closer to what is used on OpenStreetMap and might be more intuitive for the user to associate it with the geolocation functionality, what do you think?

https://fontawesome.com/icons/location-arrow?style=solid

Side note: what are we using at the moment for this widget? Are we using the leaflet-locatecontrol below or is it more custom code?

https://github.com/domoritz/leaflet-locatecontrol