Issue #2279697 by kpv: Fixed Notice: Undefined index: value in Drupal\geofield\Plugin\Field\FieldWidget\GeofieldLatLonWidget->massageFormValues().
Issue #2310525 by plopesc: Fixed GeoConstraint class allows invalid WKT values.
Issue #2310523 by plopesc: Fixed GeofieldLatLonWidget html5_geolocation option does not work.
Issue #2310517 by plopesc: Added Improve GeoFieldLatLonWidget error messages.
Issue #2310511 by plopesc: Fixed Quickedit not enabled for geofield fields.
Use FormStateInterface instead of arrays and get things working again