ComposerViewModel may be undefined

Instructions for setting up your homeserver

Add title and screenshot

Signed-off-by: Will Hunt <will@half-shot.uk>

Show tile when user leaves rooms

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