Default filter for reports set to past month

Author: rogyar

app/code/Magento/Reports/Block/Adminhtml/Grid.php

@@ -135,8 +135,8 @@ protected function _prepareCollection()
             $data = $this->parameters->toArray();
 
             if (!isset($data['report_from'])) {
-                // getting all reports from 2001 year
-                $date = (new \DateTime())->setTimestamp(mktime(0, 0, 0, 1, 1, 2001));
+                // Get records for the past month
+                $date = new \DateTime('-1 month');
                 $data['report_from'] = $this->_localeDate->formatDateTime(
                     $date,
                     \IntlDateFormatter::SHORT,
@@ -145,7 +145,6 @@ protected function _prepareCollection()
             }
 
             if (!isset($data['report_to'])) {
-                // getting all reports from 2001 year
                 $date = new \DateTime();
                 $data['report_to'] = $this->_localeDate->formatDateTime(
                     $date,