Set Validation Error, empty value support

That's a tricky one. The field "Field name" is defined as required in \Drupal\eca\Plugin\FormFieldPluginTrait::buildFormFieldConfigurationForm, but the sub-class add's the extra sentence to the description which indicates, the field could be left empty: \Drupal\eca_form\Plugin\Action\FormFieldSetError::buildConfigurationForm

I wonder if we should add a separate action for global form errors?

Why not just overriding '#required' => FALSE within this affected sub-class?

Ah, that's faaaar to simple ;-)

Merged.

Thanks, think it makes sense to backport also.

Done.

Automatically closed - issue fixed for 2 weeks with no activity.