Add new files to POTFILES.in

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23641 57a11ea4-9604-0410-9ed3-97b8803252fd
Release 2.6.0

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23642 57a11ea4-9604-0410-9ed3-97b8803252fd