fix for 0005123: New filter logic does not show [none] options for enumarations
fix for 0005225: Dropdown lists for Real Name sorted by first name not by last name

• controlled by new config $g_sort_by_last_name
  fix for 005226: When setting filters for ALL Projects, no reporters, developers, etc.. listed when
  project_user_list is empty

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@3285 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9