TF-381 Apply new UI for emails selection active

model/lib/extensions/list_presentation_email_extension.dart

@@ -3,4 +3,8 @@ import 'package:model/email/presentation_email.dart';
 
 extension ListPresentationEmailExtension on List<PresentationEmail> {
   bool get isAllEmailRead => every((email) => email.isReadEmail());
+
+  bool get isAllEmailStarred => every((email) => email.isFlaggedEmail());
+
+  List<PresentationEmail> get allEmailUnread => where((email) => email.isUnReadEmail()).toList();
 }