[FIXED] Moved migration into the persistence queue by performing it on willLoadStore.
[FIXED] Re-enabled cloud after migration.
[UPDATED] Allow rebuilding the old cloud store if it got deleted locally.
[IMPROVED] Don't block when MOC is not yet ready, just return nil.
[IMPROVED] Outdated tip links to info, icon links to site search.
[IMPROVED] Minor improvements to error handling during import.