version 3.0.0

• Remove notification polling and handle notification websocket events
• Remove polling of instance states and instance list: use websocket events
• Automatically reconnect EventGateway on disconnect. Add ping-pong keep-alive events.
• Update all event names
• Add EventGateway websocket, created when valid account loaded, for all events and notifications (other than remote desktop)
• Send thumbnails using the REST API
• Use standard websocket for WebX tunnel (pure binary can now be used for WebX)
• Use official guacamole-common-js on a standard websocket (remove socket.io for remote desktop)
• Adapt to Quarkus server: change of graphql endpoint