Switching belts

[ben]

I know this is a very well known side effect, but it seems like incorrect behavior.
When switching between belts that grant extra utility slots, the items in the extra utility slots are always unequipped, even if the new belt is large enough to contain them.

For example:
Switching from Launcher Grenade Strap Belt (+1 utility slot) to Large Waist Pack (+1 utility slot) will cause the item in the extra utility slot to be unequipped.

If both belts have 3 utility slots, then all 3 slots should remain equipped, which is the regular behavior for the first 2 utility slots.

[Styg]

I remember looking into this before and it's not trivial to fix and could potentially cause other bugs, so I let it be.