Add localization for 'none_group' option in English and German

lib/l10n/generated/app_localizations.dart

@@ -446,6 +446,12 @@ abstract class AppLocalizations {
   /// **'None'**
   String get none;
 
+  /// None group option label
+  ///
+  /// In en, this message translates to:
+  /// **'None'**
+  String get none_group;
+
   /// Button text to create a match
   ///
   /// In en, this message translates to:

lib/l10n/generated/app_localizations_de.dart

@@ -195,7 +195,10 @@ class AppLocalizationsDe extends AppLocalizations {
   String get group => 'Gruppe';
 
   @override
-  String get none => 'Keine';
+  String get none => 'Kein';
+
+  @override
+  String get none_group => 'Keine';
 
   @override
   String get create_match => 'Match erstellen';

lib/l10n/generated/app_localizations_en.dart

@@ -196,6 +196,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get none => 'None';
 
+  @override
+  String get none_group => 'None';
+
   @override
   String get create_match => 'Create match';