Jared Forsyth 53b2c39cc0 select up and down the inspector hierarchy
Summary:
This allows you to select the displayed owner hierarchy, and see the styles,
props, and position.

@public

Test Plan:
Open the inspector, select something in the middle of the page. Click the
breadcrumb train in the inspector, and verify that:
- styles are reflected
- margin/padding/box is correct
- the highlight updates to show the selected item

See video as well.

[Video](https://www.latest.facebook.com/pxlcld/mqnl)

Screenshot
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