Force invoices to be after other records

Force invoices to go after other records.  Since the IDs don't correlate (different sources) they needed to be forced after the order was made.

Author: PromInc

app/code/Magento/Sales/Block/Adminhtml/Order/View/Tab/History.php

@@ -127,7 +127,8 @@ public function getFullHistory()
                 $_invoice->getId(),
                 __('Invoice #%1 created', $_invoice->getIncrementId()),
                 $_invoice->getEmailSent(),
-                $this->getOrderAdminDate($_invoice->getCreatedAt())
+                $this->getOrderAdminDate($_invoice->getCreatedAt()),
+                'Invoice created'
             );
 
             foreach ($_invoice->getCommentsCollection() as $_comment) {
@@ -313,6 +314,9 @@ public static function sortHistoryByTimestamp($a, $b)
         $createdAtB = $b['created_at'];
 
         if( $createdAtA->getTimestamp() === $createdAtB->getTimestamp() ) {
+            if( $a['comment'] == 'Invoice created' || $b['comment'] == 'Invoice created' ) {
+                return ( $a['comment'] == 'Invoice created' ? 1 : -1 );
+            }
             return $a['entity_id'] <=> $b['entity_id'];
         }