UTF-8 language header files

[yhfudev]

This is a language string patch for the PR #5441, by defining a macro _UxGT() to relieve the burden for maintaining the UTF-8 patches, which I suggested in #3350 (comment) . It do NOT add or change any existing functions.

@thinkyhead I tried use git rebase, and unfortunately, I deleted this branch, so I resubmit it again. Sorry!

[thinkyhead]

I think that it would be best for #define CUSTOM_MACHINE_NAME (in the Configuration.h files) that unless the custom name has non-ASCII characters, we should leave out UxGT(...). I'd like to keep this macro out of the configurations. Will that work?

[yhfudev]

I agree, but I can't push my changes after run git rebase, so I just use the merge and reverted the changes.

[petrzjunior]

@yhfudev After rebasing you need to force push git push repository branch -f if I'm not mistaken...

[thinkyhead]

git push -f origin ftw.

[yhfudev]

It works!! Thanks @thinkyhead, @petrzjunior

[thinkyhead]

Merged this and rebased #5441 onto the latest.