GUI: Nestable Table Widget, with view-toggle

[tangkong]

Current Behavior

Currently shows a simple table view with information on Nestable entry types

Expected Behavior

This is useful but hides the sub-parameters.

Perhaps there should be a toggle that swaps between showing the

• Collections as-grouped
• Collections with sub-parameters visible?
• Flattened only-parameter view, with containing nestable references shown

This will likely involve packaging these into proper widgets, rather than leaving it up to the user to make the model and assign it to a widget.

This should remain a table view, rather than a tree view (covered by existing tree views)

Context / environment

Thoughts in making this table view more usable and applicable to other pages.

Steps to Reproduce (for bugs)

N/A

Suggested Solution

a bit of a refactor
To look into: does adding children to Table items mean anything? Do they get hidden?
Do we have to use a proxy model here