"Shield Throw X" trait does not propagate "Thrown X" trait to attached items

[TMunsie]

A shield boss or other attached item should propagate this down so that there is a ranged, dex-based attack on the attached item. This is because a rune cannot be added to the shield, but it can be added to the attached item, so the generated damages and attack modifiers are correct on the melee and thrown shield, and the melee attached weapon, but incorrect for a ranged attack due to the shield throw X trait should the attached item have potency/striking/other damaging runes.