Does DraftSight support making an attribute of a nested block appear as if it is actually an attribute of the parent block? For example, suppose there is a block named "InnerBlock" with block attributes "a" and "b," and I define a new block named "OuterBlock" which contains an "InnerBlock" and also has its own block attributes "c" and "d." Can I make the "a" attribute of the "InnerBlock" instance show up in the properties editor of the "OuterBlock" instance, so that I can edit the "a," "c," and "d" attributes at the same time? Thanks.