Add back translation support in combo boxes that was accidentally removed in 1286a896a66a3002e98913b9016f1dc56f7137d7

Author:    Aurimas Fišeras <aurimas@members.fsf.org>

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23093 57a11ea4-9604-0410-9ed3-97b8803252fd