Add Remove Buff Behavior and patch infinite use Imagination Backpack(#845)

Testing does not reveal any issues with existing buff removals sending this GM as well and may fix more bugs that were unknown, or cause more.

dGame/dComponents/InventoryComponent.cpp

@@ -986,6 +986,7 @@ void InventoryComponent::ApplyBuff(Item* item) const {
 	}
 }
 
+// TODO Something needs to send the remove buff GameMessage as well when it is unequipping items that would remove buffs.
 void InventoryComponent::RemoveBuff(Item* item) const {
 	const auto buffs = FindBuffs(item, false);