* fixes bug where errors on geometry form were not rendered properly
* fixes bug where invalid geometry was written as read-only back into form (could not be corrected by user)
* adds explanatory comments to SimpleGeomForm is_valid() checks
* reorders code snippets for better understanding
* adds correcting logic to _set_geojson_properties() in case of missing properties element
mpeltriaux
5e65b8f4dc