Patterns: obscure pattern internals in the list view when a pattern is in content only mode #72019
Description
For patterns in "Spotlight mode" (currently being edited in the canvas) fade out surrounding unselected blocks in the block tree in the List View
The following is recording is taken from #73466:
editing.nonsync.pattern.mp4
Use it as a guide only.
This matches the "faded" out blocks in the canvas and preserves access to the full block tree. Spotlight mode should apply to both the canvas and the list view so that focus is visually coherent in both places.