"I'm not sure if I translated your question right" sorry for russian in comments )
1) I can prepare and upload it here, but I think it more useful commit it to community/themes folder in repository. Is it free for commit or you yourself decide what to make of this branch of the repository?
2) "but you asking where and how you can pull the lastest code changes /fixes?" yes, absolutely. Now I integrate 5.0rc and find some errors. Some errors I can fix myself, without needs to contribute it in bugtracker. So, what best behaviour in this situation?