Enhancement: Add Empty State slot to calcite-pick-list

[joeyHarig]

Description

Add a slot for developers to implement an empty state when a filter enabled calcite-pick-list returns no results.

Acceptance Criteria

• Add slot for an empty state to calcite-pick-list

Relevant Info

No response

Which Component

calcite-pick-list

Example Use Case

Developers may want to add info such as 'no items found' or actions to create additional options when no options match the search string.

[macandcheese]

Can you conditionally display an element when there are no results?
It's confusing to use since the event comes from the internal filter, and you need to infer what items are displayed:

Something like this: https://codesandbox.io/s/green-wave-bgulis?file=/src/App.js

@jcfranco @benelan - it's hard to tell you can even use the filter events through the list. Maybe we can update doc?

[geospatialem]

With the calcite-list component refactor, we won't be adding additional enhancements to the calcite-pick-list at this time. The component refactor includes a filter which can listen for results.

The workaround from @macandcheese above has a workaround.

Closing the issue for the above refactor for next month's release and workaround prior to the release.