6595: create a new template every time we are extracting strings from python modules

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22165 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
6595: add new keywords for xgettext (textual reports and L10N/I18N)

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22166 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
more flexible multi-column format for BooleanListOption

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22168 4ae1f11a-8b86-4847-b8af-ab372f36d1fd