Comment 19 for bug 1727557

Patch pushed to the same branch (also rebased to master) that segregates the offline block list and transaction data into its own database, which is only initialized in the offline interface. This allows the browser to ignore those large data blobs on most pages.

Note this code change assumes any outstanding offline data is uploaded and processed before upgrading. Ideally, users would delete the offline database first, but it's not strictly required.