Merge branch 'MDL-65858_37' of git://github.com/markn86/moodle into MOODLE_37_STABLE

Author: snake

backup/externallib.php

@@ -71,6 +71,9 @@ public static function get_async_backup_progress($backupids, $contextid) {
         require_once($CFG->dirroot . '/backup/util/includes/backup_includes.php');
         require_once($CFG->dirroot . '/backup/util/includes/restore_includes.php');
 
+        // Release session lock.
+        \core\session\manager::write_close();
+
         // Parameter validation.
         self::validate_parameters(
                 self::get_async_backup_progress_parameters(),
@@ -142,6 +145,9 @@ public static function get_async_backup_links_backup_parameters() {
      * @since Moodle 3.7
      */
     public static function get_async_backup_links_backup($filename, $contextid) {
+        // Release session lock.
+        \core\session\manager::write_close();
+
         // Parameter validation.
         self::validate_parameters(
                 self::get_async_backup_links_backup_parameters(),
@@ -206,6 +212,9 @@ public static function get_async_backup_links_restore_parameters() {
      * @since Moodle 3.7
      */
     public static function get_async_backup_links_restore($backupid, $contextid) {
+        // Release session lock.
+        \core\session\manager::write_close();
+
         // Parameter validation.
         self::validate_parameters(
                 self::get_async_backup_links_restore_parameters(),

backup/util/ui/amd/build/async_backup.min.js

@@ -39,7 +39,7 @@ define(['jquery', 'core/ajax', 'core/str', 'core/notification', 'core/templates'
      * Module level variables.
      */
     var Asyncbackup = {};
-    var checkdelay = 5000; //  How often we check for progress updates.
+    var checkdelay = 15000; //  How often we check for progress updates.
     var backupid; //  The backup id to get the progress for.
     var contextid; //  The course this backup progress is for.
     var restoreurl; //  The URL to view course restores.