Fixes for wireless chargers

[Jonodonozym]

Addresses Modpack issue #14596

The wireless charger stops working in single player when the player saves and quits to the title screen, then reopens the world. Closing and relaunching the client is the only way to fix this.

This happens because while the Wireless Charger object gets destroyed when the chunk is unloaded, that 'ghost' object remains in the static ChargingHelper. When the chunk is reloaded, a new wireless charger object is created, but is not added to the ChargingHelper because the 'ghost' object occupies the same position. This 'ghost' object is drained of energy but doesn't receive any energy so it runs out after a few ticks.

This fix replaces the old 'ghost' charger object with the new instance of the same charger.

[Jonodonozym]

Also just spotted another theoretical bug for MP.

The tick counter in ChargingHelper increases per playertickevent rather than per servertickevent, meaning

• only one player per second will get charged i.e. charges slower the more players are online
• while there are an even number of players online, most of them will never get charged

Will add a fix shortly.