related to #126
When multiple players are in one client, every time, the throwing player is changed, the client should check whether it has such a player in its set of client-side players and than switch the player if possible.
such an automatic switching schould problably also be visualized to the user.
perhaps via an semi-transparent, automatically disapearing toast https://getbootstrap.com/docs/4.2/components/toasts/#translucent or an alert https://getbootstrap.com/docs/3.4/javascript/#alerts