Fix command bar scroll reset

[arjunkomath]

Summary

• reset the command result list to the top whenever the filter changes
• keep the fix local to the dashboard command menu

Verification

• npx biome check components/dashboard/dashboard-command-menu.tsx
• ./node_modules/.bin/tsc --noEmit
• git diff --check

Basecamp

• https://app.basecamp.com/5890597/buckets/47439993/todos/10158885850

Manual UI verification was not run.

[github-actions]

React Doctor found no issues. 🎉

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_{Reviewed by React Doctor for commit 6f05ff4.}