Ben Konyi 1d19f97833
[ Widget Preview ] Respond to IDE navigation events and show previews from the currently focused script (#174466)
This change allows for the widget previewer to react to
`activeLocationChanged` events sent over the `Editor` DTD service to
automatically filter the set of visible previews based on the currently
selected file in the IDE. This functionality can be turned on or off
depending on whether or not the developer wants to see all previews in
the project at once.

This change also includes some minor refactoring and UI changes to move
the widget preview environment controls to a reserved area at the bottom
of the preview window.

**Demo:**


https://github.com/user-attachments/assets/c3b93826-8437-4655-8264-6beed6651fe7
2025-09-02 16:49:11 +00:00
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