Fix bug_report.php regressions

Commit a7ae02d (issue #21683)
introduced 2 regressions when displaying bug report page:

- Confirmation message as '0': due to a missing parameter in the
  html_operation_confirmation() call
- Incorrect display of the footer: caused by an extra div tag

Fixes #21710

bug_report.php

@@ -327,7 +327,7 @@
 	array( string_get_bug_view_url( $t_bug_id ), sprintf( lang_get( 'view_submitted_bug_link' ), $t_bug_id ) ),
 	array( 'view_all_bug_page.php', lang_get( 'view_bugs_link' ) ),
 );
-html_operation_confirmation( $t_buttons, CONFIRMATION_TYPE_SUCCESS );
+html_operation_confirmation( $t_buttons, '', CONFIRMATION_TYPE_SUCCESS );
 
 if( $f_report_stay ) {
 ?>
@@ -352,9 +352,5 @@
 	</p>
 <?php
 }
-?>
-</div>
-</div>
 
-<?php
 layout_page_end();