Inventory: Fix missing setModified calls

Previously inv:remove_item and inv:set_list did not trigger an inventory update

src/inventory.cpp

@@ -685,6 +685,8 @@ ItemStack InventoryList::removeItem(const ItemStack &item)
				break;
		}
	}
	if (!removed.empty())
		setModified();
	return removed;
}

@@ -936,15 +938,18 @@ InventoryList * Inventory::addList(const std::string &name, u32 size)
		{
			delete m_lists[i];
			m_lists[i] = new InventoryList(name, size, m_itemdef);
			m_lists[i]->setModified();
		}
		return m_lists[i];
	}


	//don't create list with invalid name
	if (name.find(' ') != std::string::npos) return NULL;
	if (name.find(' ') != std::string::npos)
		return nullptr;

	InventoryList *list = new InventoryList(name, size, m_itemdef);
	list->setModified();
	m_lists.push_back(list);
	return list;
}