message: shorten signin label to aid fr i18n
diff: "'%(alias)s' is not a valid format for an address": "'%(alias)s' is not a valid format for an address",
  "'%(alias)s' is not a valid format for an alias": "'%(alias)s' is not a valid format for an alias",
  "%(displayName)s is typing": "%(displayName)s is typing",
  - "I want to sign in with": "I want to sign in with",
  + "Sign in with": "Sign in with",
  "Join Room": "Join Room",
  "joined and left": "joined and left",
  "joined": "joined",
  