Creating a new issue based on lbryio/lbry-sdk#877

• Update ensure_directory_exists() to check that the directory is writable by the current process.
• If it's not, return a useful error
• Add tests to cover the case when
  • download directory does not exist
  • download dir exists but is not writable
  • dir exists an

After X minutes of being open plus Y seconds of idleness (i.e. don't reload while user is moving mouse, etc.), reload the homepage or category pages to show the latest content.

Those two things tend to stall a bit on startup. It would be nice to have the [0%]... output for them.

The Issue

When sending funds, especially on Mobile, it's useful to have the abi

When a reorg happens, it is detected by Chainquery and handled such that Chainquery stays at the top of the chain. However, the current state is just that a reorg notification is only logged and not recorded.

We should create a table called reorgs. It should have columns: id, depth, created_at, height, block_hash_list. The block_hash_list should be a json string array of the hash

You may want to use https://github.com/netproteus/protobuf2flowtype, which may require https://github.com/dcodeIO/ProtoBuf.js/ and changes to build.sh

Acceptance Criteria

Definition of Done

• Tested against acceptance criteria
• Tested against the assumptions of the user story
• The project builds without errors
• Unit tests are written and passing