Barrels should show their contents when in a vehicle

[bmjclark]

Barrels should show their contents when they're in a snekkja/knarr/rowboat/wagon. It'd just make loading up on water at a well slightly easier. Just putting the icons that exist on the barrels when they're out in the world into the vehicle UI would help a lot.

[EnderWiggin]

Another solution may be adding proper tooltips/properties to objects in storage - currently they have none. Would be cool if they would be displayed as regular items, with all relative info. This would add quality, contents etc. to those icons.

[Sevenless]

Also kind of opens the possibility of wagon storage for bulk assorted barrel ingredients. Can't say aesthetically I'm fond of that, but something like that (as a formal buildable thing) has been requested for a while.