Additions:
- added equipped checkbox to item sheet
- added item owner to item properties list
- added some translations
- added some TODOs
Changes:
- item properties owner, equipped, quantity, storageLocation
are only shown if item is owned by an actor
- moved item properties price and availability
to details tab
- shortened ItemEquipped translation
- added item.actor and item.isOwned property values
to data returned from DS4ItemSheet.getData
(properties aren't accessible in Handlebars)