Add an option to autosave/save code in the online editor when working on a kata

[Srbb]

I have been working on a challenging kata and progressing a little bit at a time instead of finishing it in one sitting, but since there is no save option whenever my browser closed or the page reloaded without me submitting the code I have lost most of the progress I had made.
Are kata intended to be solved in one sitting? Or should incremental progress and be encouraged?

[JohanWiltink]

Your code should be remembered if you Test, regardless of passing or failing that test. This even works across multiple devices under the same CW account.

So there already is Autosave.