Changing style for the Purge link to match other links

src/left_main.php

@@ -102,7 +102,7 @@ function formatMailboxName($imapConnection, $box_array) {
         if (($numMessages > 0) or ($box_array['parent'] == 1)) {
             $urlMailbox = urlencode($real_box);
             $line .= "\n<small>\n" .
-                    '&nbsp;&nbsp;[<a href="empty_trash.php" style="text-decoration:none">'._("purge").'</a>]' .
+                    '&nbsp;&nbsp;[<a href="empty_trash.php">'._("Purge").'</a>]' .
                     '</small>';
         }
     }