+ Add: New property BanCount in TournamentRound to save the number of bans
# osu.Game.Tournament/Screens
+ Add: New slider setting in RoundEditorScreen to select the number of bans per round
* Change: Modified setNextMode behavior to get the round ban count, and select bans accordingly
Rather than continuing with `ID` or `Id`, this should follow the new
standards and use `OnlineID` instead. Only updating this since it's a
newly introduced class.