I know I released 18.104.22.168 a few days ago, but a couple of people wrote in with some fixes that I had to take care of. Upon completed the fixes, I implemented a new feature I was going to save until later (ha ha pun). - Timed Auto Save.
I've done it myself. Started writing a long page of text in a Document, then went away to make lunch only to return to a laptop and a dead battery. If only there was a way to save changes whilst I was away from the keyboard .... hmmm.
There is a new setting in the [Settings & Preferences] under Documents, Journals, Finance/Spreadsheets and Noteboards.