FE-1732: Add default max width to menu component lists

[alex-e-leon]

🌟 What is the purpose of this PR?

See title

Pre-Merge Checklist 🚀

🚢 Has this modified a publishable library?

This PR:

• does not modify any publishable blocks or libraries, or modifications do not need publishing

📜 Does this require a change to the docs?

The changes in this PR:

• are internal and do not require a docs change

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[cursor]

PR Summary

Low Risk
CSS-only layout constraints in design-system recipes with no auth, data, or runtime logic changes.

Overview
Menu-style SelectableList popovers now get a default maxWidth of min(500px, 70vw) on their content slot, so long option lists don’t stretch unbounded on wide viewports.

The Filter sort menu keeps its tighter 300px cap by moving that rule under a && selector, so it reliably overrides the new shared menu default when specificity would otherwise tie on extraction order.

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