feat: 4513 - user preferences pages simple refactoring (#4620)

New files:
* `user_preferences_advanced_settings.dart`: used to be `_AdvancedSettings` in `user_preferences_settings.dart`
* `user_preferences_camera_sound.dart`: used to be `_CameraPlayScanSoundSetting` in `user_preferences_settings.dart`
* `user_preferences_choose_accent_color.dart`: used to be `_ChooseAccentColor` in `user_preferences_settings.dart`
* `user_preferences_choose_app_theme.dart`: used to be more or less `_ChooseAppTheme` in `user_preferences_settings.dart`
* `user_preferences_choose_text_color_contrast.dart`: used to be `_ChooseTextColorContrast` in `user_preferences_settings.dart`
* `user_preferences_country_selector.dart`: used to be coded in `user_preferences_settings.dart`
* `user_preferences_crash_reporting.dart`: used to be `_CrashReportingSetting` in `user_preferences_settings.dart`
* `user_preferences_haptic_feedback.dart`: used to be `_HapticFeedbackSetting` in `user_preferences_settings.dart`
* `user_preferences_image_source.dart`: used to be coded in `user_preferences_settings.dart`
* `user_preferences_language_selector.dart`: used to be coded in `user_preferences_settings.dart`
* `user_preferences_rate_us.dart`: used to be `_RateUs` in `user_preferences_settings.dart`
* `user_preferences_send_anonymous.dart`: used to be `_SendAnonymousDataSetting` in `user_preferences_settings.dart`
* `user_preferences_share_with_friends.dart`: used to be `_ShareWithFriends` in `user_preferences_settings.dart`

Impacted files:
* `abstract_user_preferences.dart`: minor refactoring
* `preferences_page.dart`: minor refactoring
* `user_preferences.dart`: minor refactoring
* `user_preferences_account.dart`: removed `UserPreferencesSection` and `_UserPreferencesAccountSubTitleSignOut` for simplification
* `user_preferences_attribute_group.dart`: refactored as not `AbstractUserPreferences`
* `user_preferences_connect.dart`: minor refactoring
* `user_preferences_contribute.dart`: minor refactoring
* `user_preferences_dev_mode.dart`: minor refactoring
* `user_preferences_faq.dart`: minor refactoring
* `user_preferences_food.dart`: minor refactoring
* `user_preferences_page.dart`: minor refactoring
* `user_preferences_settings.dart`: file was too big - moved code to new files+classes

packages/smooth_app/lib/data_models/preferences/user_preferences.dart

@@ -314,8 +314,10 @@ class UserPreferences extends ChangeNotifier {
   String? getDevModeString(final String tag) =>
       _sharedPreferences.getString(tag);
 
-  Future<void> setActiveAttributeGroup(final String value) async =>
-      _sharedPreferences.setString(_TAG_ACTIVE_ATTRIBUTE_GROUP, value);
+  Future<void> setActiveAttributeGroup(final String value) async {
+    await _sharedPreferences.setString(_TAG_ACTIVE_ATTRIBUTE_GROUP, value);
+    notifyListeners();
+  }
 
   String get activeAttributeGroup =>
       _sharedPreferences.getString(_TAG_ACTIVE_ATTRIBUTE_GROUP) ??

packages/smooth_app/lib/pages/onboarding/preferences_page.dart

@@ -115,7 +115,6 @@ class _HelperState extends State<_Helper> {
     pageData.addAll(
       UserPreferencesFood(
         productPreferences: productPreferences,
-        setState: setState,
         context: context,
         userPreferences: userPreferences,
         appLocalizations: appLocalizations,

packages/smooth_app/lib/pages/preferences/abstract_user_preferences.dart

@@ -8,23 +8,20 @@ import 'package:smooth_app/themes/constant_icons.dart';
 /// Abstraction of a display for the preference pages.
 abstract class AbstractUserPreferences {
   AbstractUserPreferences({
-    required this.setState,
     required this.context,
     required this.userPreferences,
     required this.appLocalizations,
     required this.themeData,
   });
 
-  /// Function that refreshes the page.
-  final Function(Function()) setState;
-
   final BuildContext context;
   final UserPreferences userPreferences;
   final AppLocalizations appLocalizations;
   final ThemeData themeData;
 
   /// Returns the type of the corresponding page if relevant, or else null.
-  PreferencePageType? getPreferencePageType();
+  @protected
+  PreferencePageType getPreferencePageType();
 
   /// Title of the header, always visible.
   String getTitleString();
@@ -45,6 +42,7 @@ abstract class AbstractUserPreferences {
         child: getHeaderHelper(false),
       );
 
+  @protected
   Icon? getForwardIcon() => UserPreferencesListTile.getTintedIcon(
         ConstantIcons.instance.getForwardIcon(),
         context,
@@ -71,25 +69,10 @@ abstract class AbstractUserPreferences {
   IconData getLeadingIconData();
 
   /// Body of the content.
-  @protected
   List<Widget> getBody();
 
-  /// Returns possibly the header and the body.
-  List<Widget> getContent({
-    final bool withHeader = true,
-    final bool withBody = true,
-  }) {
-    final List<Widget> result = <Widget>[];
-    if (withHeader) {
-      result.add(getHeader());
-    }
-    if (withBody) {
-      result.addAll(getBody());
-    }
-    return result;
-  }
-
   /// Returns the action when we tap on the header.
+  @protected
   Future<void> runHeaderAction() async => Navigator.push<Widget>(
         context,
         MaterialPageRoute<Widget>(