* Cosmetics, spelling, etc.
* Aristo: make sure that a save cycle always commits even when empty
why:
If `Kvt` is tied to the `Aristo` DB save cycle, then this save cycle
must also be committed if there is no data to save for `Aristo`.
Otherwise this will lead to excessive core memory use with some fringe
condition where Eth headers (or blocks) are downloaded while syncing
and not really stored on disk.
* CoreDb: Correct persistent save mode
why:
Saving `Kvt` first is seen as a harbinger (or canary) for `Aristo` as
both run in sync. If `Kvt` succeeds saving first, so must be `Aristo`
next. Other than this is a defect.
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