GrampsLocale: get_relationship_calculator: Fix missed variable name change.

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21168 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
GrampsLocale: Fix the typo in my typo fix.

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21169 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
GrampsLocale: Convert some late-added translations to GRAMPS_LOCALE

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21170 4ae1f11a-8b86-4847-b8af-ab372f36d1fd