Fix how to process attribute match score (openfoodfacts#627)

* Don't show label attribute widgets when their status is unknown

* Create named arguments

* First version of displaying eco card with knowledge panels

* Pubspec changes revert

* Pubspec changes revert

* Pubspec changes revert

* Pubspec changes revert

* Comments resolution and adhere to new BE format

* Revert pubspec.yaml

* Work with nullable elements

* Fix padding

* Add a padding after Icon in Score Card (otherwise on smaller devices the text appears right next to the icon)

* Create a place for shared constants in Smoothie to go

* Merge conflicts resolution

* Add comment

* Make new_product_page responsive on multiple devices

* Update constants.dart

* Tiny

* Update sorting order

* Add some more consts

* Move ui_helpers to -> smooth_ui_library

* Format

* Some more changes

* Merge

* Merge

* Merge

* Updates to ui_helper

* Format

* Remove 'Loading..' text and fix some padding

* Remove 'Loading..' text and fix some padding

* Remove 'Loading..' text and fix some padding

* Fix how to process attribute match score

Co-authored-by: Jasmeet Singh <jasmeetsingh@google.com>

packages/smooth_app/lib/helpers/attributes_card_helper.dart

@@ -41,7 +41,8 @@ AttributeEvaluation getAttributeEvaluation(Attribute attribute) {
   // > 100: Unknown
   final int matchGrade = (attribute.match! / 20.0).ceil();
   switch (matchGrade) {
-    case 0 | 1:
+    case 0:
+    case 1:
       return AttributeEvaluation.VERY_BAD;
     case 2:
       return AttributeEvaluation.BAD;