Some feedback on the last-saved feature

Thanks for that feedback, @danbjoseph! This pyxform release unmasked a regression in Collect that resulted in an error being shown when downloading forms with last-saved (Error dialog when downloading form with last-saved) this has now been fixed and released in v1.25.2 so the feature should be ready for use.

All of those uses sound great. I've proposed some additions to the documentation based on your feedback at https://github.com/opendatakit/docs/pull/1177.