TF-3944 Use new style with line height 24px in content writing of composer view

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

core/lib/presentation/utils/html_transformer/dom/hide_draft_signature_transformer.dart

@@ -14,7 +14,7 @@ class HideDraftSignatureTransformer extends DomTransformer {
     Map<String, String>? mapUrlDownloadCID
   }) async {
     try {
-      final signature = document.querySelector('div.tmail-signature');
+      final signature = document.querySelector('.tmail-signature');
       if (signature == null) return;
       final currentStyle = signature.attributes['style']?.trim();
       if (currentStyle == null) {

core/lib/presentation/utils/html_transformer/dom/signature_transformers.dart

@@ -15,7 +15,7 @@ class SignatureTransformer extends DomTransformer {
     Map<String, String>? mapUrlDownloadCID,
   }) async {
     try {
-      final signatureElements = document.querySelectorAll('div.tmail-signature');
+      final signatureElements = document.querySelectorAll('.tmail-signature');
 
       if (signatureElements.isEmpty) return;