staticMap is limited to `lat` and `lng` properties to work

[lionel-bijaoui]

staticMap don't work in the dev example because geo data is defined with latitude and longitude properties.
Maybe it need a staticMapOptions with properties to map to the good value:

{
    type: "staticMap",
    label: "Map",
    model: "address.geo",
    staticMapOptions: {
        lat: "latitude",
        lng: "longitude",
        sizeX:600,
        sizeY:300
    }
}

edit: size param too

[lionel-bijaoui]

I'm going to do a PR that add many parameters and fix the issue

[icebob]

Good solution. Thanks!