fix for 0004652: Fixed in Version not applyed to Bug at CLOSE
Solution is more generic. All changed state information is updated for
any update using bug_api:bug_update, but added a flag to supress email
messaging in certain changes

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@3032 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9