Dropdown list shows gap when list of options is small

[hughess]

Dropdown list height is fixed at 160px, leaving a gap under the options when the list is small:

This is set in this snippet in Dropdown.svelte:

<VirtualList height="160px" items={$items} let:item>
    <DropdownOption value={item.value} valueLabel={item.label} />
</VirtualList>

It may be possible to do something like:

<VirtualList height="{$items.length * 30}px" items={$items} let:item>
    <DropdownOption value={item.value} valueLabel={item.label} />
</VirtualList>