fix(core): prevent popup dock icons from being dimmed

[SaKaNa-Y]

Description

Fixed an issue where dock sidebar icons became greyed out in popup mode (especially noticeable with brand icons like Vite+ and Nuxt).

before:

now:

Linked Issues

Additional context

[pkg-pr-new]

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@vitejs/devtools

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@vitejs/devtools-kit

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@vitejs/devtools-oxc

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@vitejs/devtools-rolldown

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@vitejs/devtools-vite

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@vitejs/devtools-vitest

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commit: ddf0b62