Server improperly handling manual client sort/stack packet.

[RubenatorX]

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OS / platform the server is running (if known)

Ubuntu 22.04

Branch affected by issue

base

Steps to reproduce

1. Make sure "Config -> Gameplay -> Inventory -> Sort" is set to "OFF"
2. Get 3 of a stackable item (such as Bronze Bullets)
3. Split the single stack of 3 into a stack of 2 and a stack of 1, in the same bag (any bag will do) by any means necessary (moving 1 to another bag and then moving the 1 back into the same bag should suffice).
4. In the "Sort" submenu, choose "Manual", and move one item onto the other. Current behavior: The two item slots change locations in the menu (or swap if they are immediately next to each other).

Expected behavior

On Live game, the two items would be stacked because the client (automatically -- under certain stack size conditions) sends an outgoing 0x029 instructing the server to "Move" one item onto the other, which is supposed to result in the items being stacked (meaning, the 2 stacks/slots combine into a single stack of 3 of the item).