Prevent users from redacting messages sent by the operator

Update default chatterbox link

Signed-off-by: Travis Ralston <travisr@element.io>

Add support for disabling the composer until operator joins 

Pre release maintenance

Fix race in watchNotifcationCount

Use better logic for finding previously created room

Upgrade to latest sdk version

Disable button when showing spinner

Tiles for other users should show their matrix avatars

Add cypress tests

Show a spinner within the button when waiting

Add sentry support

Make branding clickable in footer