Added a refill slot to the creative inventory.

This adds a refill slot to the creative inventory. It refills to stack_max now, so if the money mod (the one with the minegeld) was installed, it would refill to 31,000 instead of 99. It can also "refill" tools (repair them completely). I also made the creative inventory pane use stack_max instead of 99.

Also added the ability to hide trash for non-creative players, and made settings local so they won't interfere with other mods.