changed mantis to use a static css file. css globals will be phased out to be replaced by the css gen script in admin/

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1543 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9