Right now the form lets you define the fields where the geometries are
stored (either in a single GeoJSON field or a pair of lat/lon fields).
When adding features, if wrong geometries are found (ie wrong field
values), the process will stop and an error notice will be shown.
Basic map view that plots points into a Leaflet map. Right now only
models with two "lat"/"lon" fields are supported. Some problems
regarding zooming to markers bounds when div not visible.