Adds some missing save arena method calls for parkourArena's edit methods.
Adds a message when a player reaches a new parkour checkpoint, and makes sure to avoid repeated messages.
Adds /dleave and /pleave as aliases to /minigamesleave
Fixes the win block type causing a win even when the win location is set.
Fixes the leave command only working for dropper arenas.
Fixes the command listener only cancelling command usage while in a dropper arena.
Fixes only dropper sessions being quit when the server stops.
