issue: Language Pack Locale Mismatch

This addresses issue 4325 where the Language Pack Locales are mismatched.
The Locale for the first language is displayed on the second language,
etc. This updates the `$manifest` variable to be set before we display
data so the correct `MANIFEST` file is included and all language data is
displayed correctly.

include/staff/system.inc.php

@@ -183,16 +183,18 @@ if (!$lv) { ?>
         $p = $info['path'];
         if ($info['phar'])
             $p = 'phar://' . $p;
+        $manifest = (file_exists($p . '/MANIFEST.php')) ? (include $p . '/MANIFEST.php') : null;
 ?>
     <h3><strong><?php echo Internationalization::getLanguageDescription($info['code']); ?></strong>
-        &mdash; <?php echo $manifest['Language']; ?>
+        <?php if ($manifest) { ?>
+            &mdash; <?php echo $manifest['Language']; ?>
+        <?php } ?>
 <?php   if ($info['phar'])
             Plugin::showVerificationBadge($info['path']); ?>
         </h3>
         <div><?php echo sprintf('<code>%s</code> — %s', $info['code'],
                 str_replace(ROOT_DIR, '', $info['path'])); ?>
-<?php   if (file_exists($p . '/MANIFEST.php')) {
-            $manifest = (include $p . '/MANIFEST.php'); ?>
+<?php   if ($manifest) { ?>
             <br/> <?php echo __('Version'); ?>: <?php echo $manifest['Version'];
                 ?>, <?php echo sprintf(__('for version %s'),
                     'v'.($manifest['Phrases-Version'] ?: '1.9')); ?>