Experience optimization

Bug Fix: Elven captives were being unconditionally converted to handymen without needing to be persuaded to surrender.
Optimization: Notifications are displayed on the right side of a soldier's death.
Bug Fix: Logistics soldiers were still picking up loot even when it was prohibited.
Optimization: Enemy corpses that have died of old age are no longer prohibited by default.
Optimization: When a shelf generates five Free Carriage transport tasks and all are completed, a sixth task can be generated.
Value Adjustment: The life-extending effect of Mushroom Essence is doubled when possessing the Longevity trait.