Update UI with release-v3.3.1

Merge pull request EventStore#724 from EventStore/embedded-default-auth

Honour default credentials set on connection

Merge pull request EventStore#720 from EventStore/ui-for-release-v330

Update UI for v3.3.0

Merge pull request EventStore#687 from EventStore/match-case-insensit…

…ive-headers

Fix copying the request headers on forwarding

Merge pull request EventStore#676 from EventStore/fixnostream

disallow empty stream name on server

Merge pull request EventStore#676 from EventStore/fixnostream

disallow empty stream name on server

Merge pull request EventStore#657 from EventStore/update-ui

Update UI and include worker-json.js

Merge pull request EventStore#657 from EventStore/update-ui

Update UI and include worker-json.js

Merge pull request EventStore#580 from EventStore/idempotent_user_cre…

…ation

Idempotent User Creation Behaviour

Fix initial replication of merged chunks