Webapp: put .distinct() last to remove duplicate matches in queries

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22978 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
7025: 4.0.2 svn 22976M fails to start catastrophically

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22979 4ae1f11a-8b86-4847-b8af-ab372f36d1fd