Fix for very long texts in a column

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23387 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Fix to convert note text str to unicode (cuni)

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23388 4ae1f11a-8b86-4847-b8af-ab372f36d1fd