TF-2116 Persist new signature when open draft email

(cherry picked from commit 4bf72a6e31855061b232fe3c6bab483bcb3f264a)

lib/features/composer/presentation/widgets/mobile/mobile_editor_widget.dart

@@ -4,18 +4,21 @@ import 'package:flutter/material.dart';
 import 'package:rich_text_composer/rich_text_composer.dart';
 
 typedef OnCreatedEditorAction = Function(BuildContext context, HtmlEditorApi editorApi, String content);
+typedef OnLoadCompletedEditorAction = Function(HtmlEditorApi editorApi, WebUri? url);
 
 class MobileEditorWidget extends StatelessWidget {
 
   final String content;
   final TextDirection direction;
   final OnCreatedEditorAction onCreatedEditorAction;
+  final OnLoadCompletedEditorAction onLoadCompletedEditorAction;
 
   const MobileEditorWidget({
     super.key,
     required this.content,
     required this.direction,
     required this.onCreatedEditorAction,
+    required this.onLoadCompletedEditorAction,
   });
 
   @override
@@ -26,7 +29,8 @@ class MobileEditorWidget extends StatelessWidget {
       addDefaultSelectionMenuItems: false,
       initialContent: content,
       customStyleCss: HtmlUtils.customCssStyleHtmlEditor(direction: direction),
-      onCreated: (editorApi) => onCreatedEditorAction.call(context, editorApi, content)
+      onCreated: (editorApi) => onCreatedEditorAction.call(context, editorApi, content),
+      onCompleted: onLoadCompletedEditorAction,
     );
   }
 }

lib/features/composer/presentation/widgets/web/web_editor_widget.dart

@@ -66,9 +66,9 @@ class _WebEditorState extends State<WebEditorWidget> {
         shouldEnsureVisible: true,
         hint: '',
         darkMode: false,
+        initialText: widget.content,
         customBodyCssStyle: HtmlUtils.customCssStyleHtmlEditor(direction: widget.direction),
       ),
-      blockQuotedContent: widget.content,
       htmlToolbarOptions: const HtmlToolbarOptions(
         toolbarType: ToolbarType.hide,
         defaultToolbarButtons: []