adaption for python version less 3.x (see issue 6465) for details

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@21515 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Better translation for compare events.

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@21517 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
6500: missing glocale

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@21519 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
6500: relative import

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@21520 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
add "Id" property

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@21521 4ae1f11a-8b86-4847-b8af-ab372f36d1fd