6864: change warning to a more user-friendly one

s/Gramps ignored namemap value/Gramps ignored a name grouping/g

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22701 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
2974: .rtf docgen doesn't escape backslashes

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22704 4ae1f11a-8b86-4847-b8af-ab372f36d1fd