Saving a translation as draft

Is there any option to save partially completed translation as a draft? If no, adding such a feature will be useful while translating big Messages.

Prepend the message with !!FUZZY!!, but just be aware that the translation may still be used.

We could probably use Extension:Draft which works beautifully in my local wiki. It is at least a means to keep some unnecessary stuff out of the revision history and reduce the text database size a bit.

We could try it out, but it would need to be integrated into the interface somehow.