[connorjclark]

Summary

Duplicate modules, per the new design:

• Every copy of a duplicated module is outlined in all view modes (All, Unused, Duplicate). Default node border is lightened to rgba(0,0,0,0.2).
• Hovering a duplicate module (in the treemap or the table) fills all of its copies with the module's color and fades everything else to white.
  • Copies too small for webtreemap to render are represented by their closest rendered ancestor.
  • When zoomed in, copies outside the current view aren't visible, so a hint is shown: "Copies outside this view: N" (new UI string).
• The Duplicate modules table now uses the same filtering as the view mode (≥2 copies, above the bytes threshold) and is sorted by duplicated bytes. Subrow spacing updated.

Stacked on the back button PR — review only the last commit.

Related Issues/PRs

Part of #16400