Update Amercan -> British translations.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23638 57a11ea4-9604-0410-9ed3-97b8803252fd
Update Last Translator and removed cruft.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23639 57a11ea4-9604-0410-9ed3-97b8803252fd