GrampsLocale: Fix glocale without import

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21525 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
GrampsLocale: Create GrampsTranslation attribute for language

Rather than relying on translators to correctly fill out po files

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21526 4ae1f11a-8b86-4847-b8af-ab372f36d1fd