Bug fixes for items / trades

- Golden Sword could be attained after slaying only a single foe with
the Tempered Sword
- Heavy and Pegasus Boots were erroneously purchased by priests instead
of blacksmiths
- Left-clicking on an entity with any of the tunic set pieces would
cause damage
- Left-clicking on an entity with any of the new potions would cause
damage
- Left-clicking on an entity with any of the masks would cause damage
- Left-clicking on an entity with any filled spirit crystal would cause
damage
- Unable to trade for water bombs if bomb bag trades were disabled
- Priests would sell magic arrows regardless of frienship status