Lockness monster

Version: 1.15.2
Issue Description: ** isLocked is only polled for PICKUP_ALL in BaseContainer, which means most actions work regardless of whether or not a slot is locked.
Replication:

1. create a simple container
2. add the following code in constructor

for (WAbstractWidget widget : mainInterface.getWidgets()) {
    if (widget instanceof WSlot) {
        ((WSlot) widget).setLocked(true);
    }
}

3. attempt to interact with any slot in the inventory

fixed in 1.15.2

1.16.3 soon

done