TF-3449 Setup Sender-set important flag in Setting View

Signed-off-by: dab246 <tdvu@linagora.com>

server_settings/lib/server_settings/converter/boolean_nullable_converter.dart

@@ -1,13 +1,13 @@
 import 'package:json_annotation/json_annotation.dart';
 
-class AlwaysReadReceiptNullableConverter implements JsonConverter<bool?, String?> {
-  const AlwaysReadReceiptNullableConverter();
+class BooleanNullableConverter implements JsonConverter<bool?, String?> {
+  const BooleanNullableConverter();
 
   @override
   bool? fromJson(String? json) {
     if (json == null) {
       return null;
-    } else if (json == 'true') {
+    } else if (json.trim().toLowerCase() == 'true') {
       return true;
     } else {
       return false;

server_settings/lib/server_settings/tmail_server_settings.dart

@@ -1,6 +1,6 @@
 import 'package:equatable/equatable.dart';
 import 'package:json_annotation/json_annotation.dart';
-import 'package:server_settings/server_settings/converter/always_read_receipt_nullable_converter.dart';
+import 'package:server_settings/server_settings/converter/boolean_nullable_converter.dart';
 import 'package:server_settings/server_settings/converter/server_settings_id_nullable_converter.dart';
 import 'package:server_settings/server_settings/server_settings.dart';
 import 'package:server_settings/server_settings/server_settings_id.dart';
@@ -28,23 +28,38 @@ class TMailServerSettings extends ServerSettings {
 @JsonSerializable(
   explicitToJson: true, 
   includeIfNull: false,
-  converters: [AlwaysReadReceiptNullableConverter()])
+  converters: [BooleanNullableConverter()]
+)
 class TMailServerSettingOptions with EquatableMixin {
   @JsonKey(name: 'read.receipts.always')
   final bool? alwaysReadReceipts;
-  TMailServerSettingOptions({this.alwaysReadReceipts});
+
+  @JsonKey(name: 'display.sender.priority')
+  final bool? displaySenderPriority;
+
+  TMailServerSettingOptions({
+    this.alwaysReadReceipts,
+    this.displaySenderPriority,
+  });
 
   factory TMailServerSettingOptions.fromJson(Map<String, dynamic> json) =>
     _$TMailServerSettingOptionsFromJson(json);
 
   Map<String, dynamic> toJson() => _$TMailServerSettingOptionsToJson(this);
 
-  TMailServerSettingOptions copyWith({bool? alwaysReadReceipts}) {
+  TMailServerSettingOptions copyWith({
+    bool? alwaysReadReceipts,
+    bool? displaySenderPriority,
+  }) {
     return TMailServerSettingOptions(
       alwaysReadReceipts: alwaysReadReceipts ?? this.alwaysReadReceipts,
+      displaySenderPriority: displaySenderPriority ?? this.displaySenderPriority,
     );
   }
 
   @override
-  List<Object?> get props => [alwaysReadReceipts];
+  List<Object?> get props => [
+    alwaysReadReceipts,
+    displaySenderPriority,
+  ];
 }

server_settings/lib/server_settings/tmail_server_settings_extension.dart

@@ -0,0 +1,8 @@
+
+import 'package:server_settings/server_settings/tmail_server_settings.dart';
+
+extension TmailServerSettingsExtension on TMailServerSettingOptions {
+  bool get isDisplaySenderPriority => displaySenderPriority ?? true;
+
+  bool get isAlwaysReadReceipts => alwaysReadReceipts ?? false;
+}