Merge forwardport of magento/magento2#12731 to 2.3-develop branch

Applied pull request patch https://github.com/magento/magento2/pull/12731.patch (created by @zamoroka) based on commit(s):
  1. 30b8293

Fixed GitHub Issues in 2.3-develop branch:
  - magento/magento2#12209: Substitution payment method - Incorrect message (reported by @ihor-sviziev)

Author: magento-engcom-team

app/code/Magento/Payment/view/adminhtml/templates/info/substitution.phtml

@@ -10,6 +10,8 @@
  */
 ?>
 <div>
-    <?php $block->escapeHtml($block->getMethod()->getTitle());?>
+    <?= $block->getMethod()->getTitle()
+        ? $block->escapeHtml($block->getMethod()->getTitle())
+        : $block->escapeHtml(__('Payment method')); ?>
     <?= $block->escapeHtml(__(' is not available. You still can process offline actions.')) ?>
 </div>