CMDHELPER-2612 - Reported by jb_aero on 2013-04-02 21:12:58 UTC

Now that we can open workbenches and enchanting inventories not tied to a block, it would be extremely useful to be able to set their contents too.

Use case:
HUD showing a crafting recipe

Solutions:

1. add another option to pworkbench() to set its contents
2. added an Inventory mutable to open_inventory event