devel-docs: clarify PROP_ITEM_PATH property.
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@ -1261,9 +1261,10 @@ PROP_ITEM_PATH (since version 3)
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uint32 plength Total length of the following payload in bytes
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item-path List of pointers, represented as uint32 values
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TODO: The code reads that it is a list of pointers, represented as uint32
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integers and somehow in the context of layers. What this is for and what
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do the property values mean?
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PROP_ITEM_PATH indicates the path of the layer if inside a group,
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i.e. its position within the group (last element of the list), but
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also the position of the group itself within its own level, up to the
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top-level position (first element).
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PROP_GROUP_ITEM_FLAGS (since version 3)
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uint32 31 Type identification
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