You can now set an item to multiple slots in your menus (completely optional) with a single item entry in your config. I know this feature has been long requested so here it is...
To allow an item to multiple slots, you will simply change the slot: entry to slots: and then switch the integer to a list of integers representing the slots you want the item to be set to! This allows you to save a ton of time and keep your configuration files small when assigning an item to multiple slots. No more duplicate config entries!
Added "unbreakable" option for items to make the item unbreakable.