MDL-63263 tool_recyclebin: show the note as part of the heading element

It looks better (IMO) than using admin_setting_description and works in all
branches.

admin/settings/courses.php

@@ -336,11 +336,7 @@ if ($hassiteconfig or has_any_capability($capabilities, $systemcontext)) {
     $temp->add(new admin_setting_configcheckbox('backup/backup_auto_skip_modif_prev', new lang_string('skipmodifprev', 'backup'), new lang_string('skipmodifprevhelp', 'backup'), 0));
 
     // Automated defaults section.
-    $temp->add(new admin_setting_heading('automatedsettings', new lang_string('automatedsettings','backup'), ''));
-    $temp->add(new admin_setting_description('recyclebin',
-        new lang_string('recyclebin', 'backup'),
-        new lang_string('recyclebin_desc', 'backup')
-    ));
+    $temp->add(new admin_setting_heading('automatedsettings', new lang_string('automatedsettings','backup'), new lang_string('recyclebin_desc', 'backup')));
     $temp->add(new admin_setting_configcheckbox('backup/backup_auto_users', new lang_string('generalusers', 'backup'), new lang_string('configgeneralusers', 'backup'), 1));
     $temp->add(new admin_setting_configcheckbox('backup/backup_auto_role_assignments', new lang_string('generalroleassignments','backup'), new lang_string('configgeneralroleassignments','backup'), 1));
     $temp->add(new admin_setting_configcheckbox('backup/backup_auto_activities', new lang_string('generalactivities','backup'), new lang_string('configgeneralactivities','backup'), 1));

lang/en/backup.php

@@ -332,5 +332,4 @@ $string['unnamedsection'] = 'Unnamed section';
 $string['userinfo'] = 'Userinfo';
 $string['module'] = 'Module';
 $string['morecoursesearchresults'] = 'More than {$a} courses found, showing first {$a} results';
-$string['recyclebin'] = 'Recycle bin';
 $string['recyclebin_desc'] = 'These settings will be also applied to recycle bin';