To some people it's uncommon to enter the options screen to change the amount of players. Let's add a select slide there, so player amount can be changed on runtime.




Other subtasks that would appear if we do that are:

1. Input configuration

1.1 Equalizer near the player, visualize that this player has a working input device

1.2 A button that opens a dialog box/screen to select that players audio device (wizard?)

1.3 Make sure this device isn't used by any other player

1.4 This should work for the party player selection too