GEP 18: Deprecate EditCitation


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/geps/gep-018-evidence-style@22486 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
GEP 18: save the citation also in the source editor


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/geps/gep-018-evidence-style@22489 4ae1f11a-8b86-4847-b8af-ab372f36d1fd