* add id to form to configure a specific form in advance, add id to handler
 * rename default_constant_value to default_constant to default_or_constant
 * adapt component rendering to match better the pre-local-config
 * drop selector from template
 * refactor sum renderings
* Rename param_names_with_id by param_names by raw_param_names
* Rename repr_with_id by repr by raw_repr