v2.9.37 — Reliable Kubernetes quick-nav menu

Fixes the Kubernetes dropdown, which (at 22 items) was the only menu tall enough to need a scrollbar on an anchor-positioned popover — making it open/behave unreliably vs the others.

• 2-column layout halves its height (~731px → ~353px) so it shows in full without a scrollbar at any viewport (column-major → reading order preserved).
• Removed flip-block (kept flip-inline): the quick-nav is a sticky top bar, so a tall menu flipped above would shoot off-screen-top. Menus always open downward now.

Verified in Chrome 148 (Playwright), viewport heights 700–1080. Cache-bust ?v=2.9.37.

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