core/sync: Log all kinds of errors (#1806)
core/sync: Log all kinds of errors (#1806)

When we encounter an error while applying a change, we check if it is
a known error in which case we log it and take the appropriate action.
However, in all other cases, we don't log the error at all which makes
it really hard to debug.
cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop