Recoverability #8
Description
What problem does this solve?
Currently the data is just stored in browser cache. Which is fine most of the time.
But if something goes wrong it would be good to be able to import an event log.
Export already works, I am just quite unsure whether I can actually reimport that.
Proposed solution
Minimum: add an import/recover button to the settings menu.
Alternatives considered
We might also do a remote backup, but that would require a server again.
It's probably best for now to keep it simple