message: Improve the tooltips on the call lobby join button
  Currently they display a redundant 'Join' tooltip on hover, and place the tooltip on the left. This removes the redundant tooltip and places the tooltip below the button, which looks a bit more balanced.
diff: @@ -246,9 +246,9 @@ export const Lobby: FC<LobbyProps> = ({ room, joinCallButtonDisabled, joinCallBu
  kind="primary"
  disabled={connecting || joinCallButtonDisabled}
  onClick={onConnectClick}
  - title={_t("Join")}
  label={_t("Join")}
  tooltip={connecting ? _t("Connecting") : joinCallButtonTooltip}
  + alignment={Alignment.Bottom}
  />
  </div>;
  };
  