6995: Fix bug in event citation filter

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22858 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Fix bug in note filters

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22861 4ae1f11a-8b86-4847-b8af-ab372f36d1fd