Instance list has expand/collapse and inspecting an instance UI action for same row.

[terrylucas]

Left-side has right-arrow and down-arrow for expanding and collapsing node to see inbound references. Clicking to the right of the arrows will show the contents of the instance.

This is not obvious to users. Work on UI maybe clicking will only expand and collapse maybe another glyph to the far right to inspect the instance? Review with Youyang.