Bug 41401: Change browser skin icon paths

henryrequested to merge
henry/tor-browser:change-browser-skin-icon-paths-bug-41401 into tor-browser-102.4.0esr-12.0-1

Closes #41401 (closed)

"cert-error.svg" and "no-search-results.svg" actually no longer exist. For this patch, I replaced the former with a warning icon. The latter was simply dropped since it was just decorative.

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