Add some new procedures for mcreator that would make modding a bit easier

Procedures to know when player inputs a block or item itll save as a globa variable. Then you can call for that saved item back. 

Procedure to call to open a specific vanilla gui and close it. I:e

Player open inventory gui.

Player open creative inventory gui

Player open furnace gui(this one might not work right)

Player open crafting table gui. 

Etc