Enhancement: Select all for combobox

[jgibson02]

Description

Provide a way to include a "select all/none" button for a pick-list Combobox

Acceptance Criteria

Relevant Info

Which Component

pick-list Combobox

Example Use Case

In ArcGIS Velocity we have a page with a data grid for items with a dropdown filter for item status (currently a calcite-react MultiSelect):

We decided to add a "select all/none" button to the list since it's common for a user to want to quickly filter down to a single/few status types but then want to go back to seeing everything.

[macandcheese]

Super valid. Some thoughts:

• This should be an opt-in functionality.
• This has also come up about the combobox as well, so any solution should be designed with both of these components in mind (dropdown multi-select too ?).
  • For combobox, this might require a new prop (also valid without the select-all use case), max-displayed-chips (?), any chips after which are appended to a “+n” chip.
  • Invokes the follow up question, “can you click the "+n" chip to show those items”

[bstifle]

Here's my design for this!

Was thinking the "Select all" label could be authored however the terminology seems fit. Same with the "all items" chip

[macandcheese]

I think we'll want to re-evaluate the above design - I also don't think this is valid for Dropdown.

The screenshot workflow in OP is valid for Combobox as shown, but likely also Pick List as described. @asangma do you have thoughts on select / deselect workflow in pick List?

Do we want to separate this out to scope the enhancements to Combobox from those to Pick List?

[jcfranco]

Do we want to separate this out to scope the enhancements to Combobox from those to Pick List?

I think separate issues would be good. Do we also need to include the value list too? cc @benelan

[geospatialem]

Related combobox issues with select all: #2162, #3074, #4738

[geospatialem]

Reassigning to June for design considerations prior to development.

[github-actions]

cc @geospatialem, @brittneytewks