[Inheritance Margin] Don't get the margin for items from metadata

[davkean]

Version Used:
Version 16.10.0 Preview 3.0 [31224.71.main]

Steps to Reproduce:

1. Navigate to something in metadata, for example:

Expected Behavior:
Get inheritance margin

Actual Behavior:
Don't get margin

[Cosifne]

Just FYI @davkean

currently you could see the margin if could expand the collapsed region.

I think the expected behavior here would be the margin still shown when the region is collapsed. (Specifically when in metadata)

[davkean]

Yes, that would be my expectation.