MultiSelect { infiniteScroll } does not work when wrapped in Drawer (e.g. via ResponsiveMenu)

[brandonmcconnell]

I'm seeing an issue where infiniteScroll in MultiSelect appears to break when loaded inside a Drawer/ResponsiveMenu.

Repro source & fix:
https://github.com/brandonmcconnell/techniq__svelte-ux/blob/main/packages/svelte-ux/src/routes/docs/components/Drawer/+page.svelte

This repro includes a userland UI fix, but this should ideally be baked into the UI itself so this sort of hacky impl can be avoided, or at least abstracted away.

[brandonmcconnell]

NOTE: This may be fixable by replacing the infiniteScroll logic with the official svelte-virtual-list package.