autosave

[red031000]

please add an autosave function that autosaves the scratch every 1 or 2 minutes, I have lost approximately an hour of work twice due to acidentally closing or otherwise moving away from the webpage, only to find that it has not saved

[ethteck]

The current idea for how to do this will be to keep the current progress in local storage.

Separately, it appears the warning that you have unsaved changes isn't always appearing. So far all we know is that it's chrome