#23481: Billing/Shipping Address edit form design update from order backend

- Messages container added to correctly apply margin between message and form
- Form wrapper html tag changed from 'fieldset' to 'div'
- Added 'admin__fieldset' class to form for standard admin styles to work properly

Author: alexey-rakitin

app/code/Magento/Sales/Block/Adminhtml/Order/Address/Form.php

@@ -108,6 +108,7 @@ protected function _prepareForm()
     {
         parent::_prepareForm();
         $this->_form->setId('edit_form');
+        $this->_form->setClass('admin__fieldset');
         $this->_form->setMethod('post');
         $this->_form->setAction(
             $this->getUrl('sales/*/addressSave', ['address_id' => $this->_getAddress()->getId()])

app/code/Magento/Sales/view/adminhtml/templates/order/address/form.phtml

@@ -4,18 +4,20 @@
  * See COPYING.txt for license details.
  */
 ?>
-<div class="message message-notice">
-    <div class="message-inner">
-        <div class="message-content"><?= $block->escapeHtml(__('Changing address information will not recalculate shipping, tax or other order amount.')) ?></div>
+<div class="messages">
+    <div class="message message-notice">
+        <div class="message-inner">
+            <div class="message-content"><?= $block->escapeHtml(__('Changing address information will not recalculate shipping, tax or other order amount.')) ?></div>
+        </div>
     </div>
 </div>
 
-<fieldset class="fieldset admin__fieldset-wrapper">
+<div class="fieldset admin__fieldset-wrapper">
     <legend class="legend admin__legend">
         <span><?= $block->escapeHtml($block->getHeaderText()) ?></span>
     </legend>
     <br>
     <div class="form-inline" data-mage-init='{"Magento_Sales/order/edit/address/form":{}}'>
         <?= $block->getForm()->toHtml() ?>
     </div>
-</fieldset>
+</div>