Cloud sync: warn on significant style deletion and allow restoring (or just store edit history?)

[eugenesvk]

I've recently had a Dropbox sync issue where an older version of an ~empty style replaced my newer version with a few pages of text.

One great way out would be for the extension to simply store the files with the edit history so you could always go back, but in the meantime, maybe the extension could warn user if a significant deletion is going to happen on sync and allow undoing it? Or maybe saving a temporary backup locally so that if you notice it later you can recover?

[tophf]

File versioning is apparently implemented by cloud providers for those rare cases where something went wrong. Identifying the file name isn't straightforward though, we don't expose the internal hash currently anywhere in the UI, so currently the only way is to inspect the storage in devtools or run editor.style._id in the devtools console of an open editor for this style.

I guess we can add a panel in the editor that shows some internal info including that id.

[eugenesvk]

Restoring isn't straightforward either, after restoring the version in the cloud, sync didn't pick it up, I had to disconnect completely, delete the old local style and reconnect - then it pulled the correct cloud file.
Is there a way to "force download" a style from the cloud?

[tophf]

No. I guess you'd have to edit the number in "_rev":"999999999" to be bigger than the value in the wrong file.