-WON'T IMPLEMENT:
-Simultaneous games: view Game + Simultaneous, using component (One)Game
-Storage: just key ID => IDs of actual games (in indexedDB)
-In Hall challenge: acceptation on sender side (who launch the game when ready --> left click [which just delete if nobody registered, with confirm box])
-
-Tournaments: merge with tournament.auder.net code. At the beginning, still admin / users. Later : admin / supervisors / users
-=> recurrent tournament, eg. every sunday (late?) afternoon + wednesday evening, Discord-vote for variant?
-(Can be replaced by still separated tournament.audeR.net, using vchess credentials...)
-