Add a "Restart parkour" thing

Since there is a parkour in the new lobby, it would be nice if you could restart the parkour and you didn't have to leave and then run back, it's inconvenient and this probably wouldn't be too hard to implement.
(also make it so that when you step on the golden preassureplate starting the parkour if you are already in one it restarts)
Note: this (say an item like return to checkpoint) should only return you to 2 blocks behind the starting possition, without actually (re)starting the parkour so you can get a running start, going over the golden preassureplate at start should always restart the parkour though if you are in a session.
Could make it so the "leave parkour" thing filled this function, instead of sending you to spawn sending you to the parkour entrance.

Also, if you die before 1st checkpoint respawning on start preasureplate should not restart parkour without first stepping off it and then onto it again.

 

Item, like the return to previous checkpoint one, maybe have it in opposite side of inventory though to minimize chance of missclickage.
also by restart i mean place you 2 blocks behind the starting preassureplate without starting the parkour so you can get a running start.
a command would work too.