fixes for 0004538: [bugtracker] $g_bug_resolved_status_threshold doesn't work correctly with additional status
and 0004440: [bugtracker] It should be possible to define an assigned to at "Change Status To"

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2969 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9