Inline map (e.g., tree Properties) is not properly updating (inspector)

[rcoreilly]

Describe the bug

If you have widgets with different Properties set, clicking on them only shows the first property value you click on -- it is not updating to the correct value for the newly clicked item.

How to reproduce

content/examples/basic, click on elements in the rendered tree -- they all show the same tag.

Example code

Relevant output

Platform

macOS