Added project name to browser title, so that it is the same as the page
title. i.e. "Mantis - project name".
Replaced several SQL queries with calls to get_project_name, located in
core_helper_API.php.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@507 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9