I've found that when doing derived parts/assemblies people are sometimes confused on why they can't turn on/off certain bodies and features; only to find out that the features are being driven by the representations tab information (model/view states). This means that the first screen you're presented with in the window is actually driven by the things on the next tab.
Obviously, this window is in need of a general refresh to match the other/updated/dark-mode screens, but until that larger update is done, I'd be happy with just these modest updates:
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