Features
- Added server metrics view to inspect NATS metrics coming from the server.

- Added view to list and get metrics of connected clients.

- Added both nats http server source and nats protocol source (via sys account) to get metrics from server.

- Added diff button to see changes betweeen different messages both for core nats messages and stream messages.

The metrics section is inspired by the amazing NATS Dashboard project. 🐰
Improvements
- Added time units in consumer ack wait and backoff configuration.
- Added connection name to connections used by NUI itself.
- Improved stability and performance of FE cards stack management and websocket connections.
Fixes
- Fixed regression with URL-unsafe characters in stream and bucket names (#77). thanks to @mimmeslemehrzad for isssue notification and PR proposal 🐰.
- Fixed error when get an empty stream with active filters.
- Fixed issue with stream reference when detaching a card.
Full Changelog: v0.7.1...v0.8.0