This is useful because everywhere that we use the AddressAndMapLocator
component we also want to use the user's location and we want to zoom
the map based on their location. Instead of tracking this externally in
3 places we just pull it into the component.
* Create a nwe AddressAndMapLocator which abstracts out the behavior of
selecting a location
* Fix the overlay causing render errors on the MapLocator by getting
rid of the overlay and just using a lock indicator
* Fix MapLocator zooming in to the wrong place by not framing the
markers
* Remove Latlng from platform and just use Location with optional
accuracy
* Use nested types with form-encoded POST
* Fix styles on water report page
