Ported ML over to 5D3 firmware 1.2.3.
Created originally on Bitbucket by chris_miller
Changesets for this Pull Request have not been imported, because it had been already declined on Bitbucket. Marked as closed by the import user.
Here's a first attempt at supporting firmware 1.2.3 on the 5D3. It builds and runs OK for the most part but there are some bugs (eg painting issues with the menus) that I don't know how to fix.