DataAssembly in Information Tab

Open an exodus file using the Ioss reader. The information tab shows this:

While this is useful, it doesn't show the logical groupping of blocks/sets etc which is provided as a vtkDataAssembly.

Solution:

Make this top part on the information tab a tabbed widget which shows the assembly in one tab and the raw hierarchy in another.
If the data doesn't have an assembly, only the hierarchy tab should be visible.
clicking on items in the assembly tree should correctly update to show array information for the selected subset (similar to how it does in the hierarchy view)

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