Form: Update Base: Don't submit anything if nothing was changed about eisvana-census

[Lenni009]

Issue: Images are not saved in stringified JSON, and a deep compare of two objects is not exactly easy.

This would fail if the user just uploads images.

Maybe we can do some sort of state subscription to detect if any data was changed?
That wouldn't protect against people who change something and then revert it, but it would prevent just clicking through.

[Lenni009]

Good idea, but bad execution:

The queries update the store as well, triggering this. This will also trigger for onUpdated, since that doesn't know about the async functions. So there should be some kind of flag set after the async functions have run, and then the subscription should start