GEP 18: fix bug due to previous commit


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/geps/gep-018-evidence-style@22455 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
GEP18: fix expand of reference section in editsource


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/geps/gep-018-evidence-style@22456 4ae1f11a-8b86-4847-b8af-ab372f36d1fd