missed a corner case in fix for 0004537: "Change Status To" shows @@ sometimes

• allow workflow for a state not to be defined
• extra current status values showed up in view.php

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2985 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9