* add additional test case for computeSyncActions

* fixup test

* check for unsafe = safe edge case & replace oldestUnsafeBlock with nextSafeBlock

* add test case for no progress and safe=unsafe

* refine log

* rename variable

* harmonize log ordering and labels

* tighten up test behaviour for expectedLogs

* add test case: no progress + unsafe=safe + blocks in state

and fix behaviour so we don't try to fetch unsafe blocks if there aren't any, even when there are blocks in state

* typo