[4.0] Private Messages: Add legend in Configuration Form

[jgerman-bot]

New language relevant PR in upstream repo: joomla/joomla-cms#33442 Here are the upstream changes:

Click to expand the diff!

diff --git a/administrator/components/com_messages/tmpl/config/default.php b/administrator/components/com_messages/tmpl/config/default.php
index e3b69c47a0edb..51d802f6a1e1a 100644
--- a/administrator/components/com_messages/tmpl/config/default.php
+++ b/administrator/components/com_messages/tmpl/config/default.php
@@ -10,6 +10,7 @@
 defined('_JEXEC') or die;
 
 use Joomla\CMS\HTML\HTMLHelper;
+use Joomla\CMS\Language\Text;
 use Joomla\CMS\Router\Route;
 
 HTMLHelper::_('behavior.formvalidator');
@@ -20,9 +21,12 @@
 	<div class="form-grid">
 		<div class="card">
 			<div class="card-body">
-				<?php echo $this->form->renderField('lock'); ?>
-				<?php echo $this->form->renderField('mail_on_new'); ?>
-				<?php echo $this->form->renderField('auto_purge'); ?>
+				<fieldset class="options-form">
+					<legend><?php echo Text::_('COM_MESSAGES_CONFIG_FORM'); ?></legend>
+					<?php echo $this->form->renderField('lock'); ?>
+					<?php echo $this->form->renderField('mail_on_new'); ?>
+					<?php echo $this->form->renderField('auto_purge'); ?>
+				</fieldset>
 			</div>
 		</div>
 	</div>
diff --git a/administrator/language/en-GB/com_messages.ini b/administrator/language/en-GB/com_messages.ini
index 3d52cc044cc4e..37a4b5a0c60ec 100644
--- a/administrator/language/en-GB/com_messages.ini
+++ b/administrator/language/en-GB/com_messages.ini
@@ -5,8 +5,8 @@
 
 COM_MESSAGES="Messaging"
 COM_MESSAGES_ADD="New Private Message"
+COM_MESSAGES_CONFIG_FORM="My Settings"
 COM_MESSAGES_CONFIG_SAVED="Configuration saved."
-COM_MESSAGES_CONFIGURATION="Messages: Options"
 COM_MESSAGES_EMPTYSTATE_BUTTON_ADD="Send a message"
 COM_MESSAGES_EMPTYSTATE_CONTENT="Send messages to other administrators on your site and read their replies."
 COM_MESSAGES_EMPTYSTATE_TITLE="There are no messages for you in your inbox."