Add Concurrency Box to Tournament Settings

[MichaelB7]

Probably the most often reason why one has to leave Tournament Settings is when they realized the concurrency setting is not set correctly.

[alwey]

In the CuteChess GUI the GameManager limits the number of concurrent games. It will start new games from the game queue only if the number of current games is less than the concurrency.

The setting
Tools->Settings->Tournaments -> Concurrent Games
is dynamic: you can change it while a tournament is going on. The change is immediately transmitted to the GameManager but only after a game has finished the change comes into action.

[MichaelB7]

That is good to know!