Add warning bar for guest users. Fixes https://github.com/vector-im/vector-web/issues/770
Add warning bar for guest users. Fixes https://github.com/vector-im/vector-web/issues/770

matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,aperezdc/matrix-react-sdk,aperezdc/matrix-react-sdk,aperezdc/matrix-react-sdk,aperezdc/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk