Users expecting "auto-save" functionality

[GoogleCodeExporter]

In as much detail as possible, please describe what you would like to see.

Context: This would be for "unpublished" explorations
Directly from users:
1. Edit content in editor view (add states, interactions)
2. Close Oppia tab
3. Re-open (some time later) and view content as you left it (without hitting 
save draft)

What operating system are you using?
MacOSX

Please provide any additional information below.
As another area of feedback, users did not expect to have to re-save changes 
they made to published explorations. This was apparent, when someone reached 
out and told me they lost a full day's worth of work. They made changes to 
their exploration, closed out, came back the next day, having never published 
the changes. 

Maybe we call this out somewhere else? In the help articles, or the forum?

Original issue reported on code.google.com by amylat...@google.com on 12 May 2015 at 5:22

[GoogleCodeExporter]

Agreed completely. I would also add that I think in-progress drafts should be 
autosaved for public explorations. Adding Sean to this.

Original comment by amitdeut...@google.com on 12 May 2015 at 5:35