Collection Item Picker: support icon colors

[madsrasmussen]

The PR updates the icon element to use umb-icon instead of uui-icon to support an icon with a color string: icon-document yellow.

Use Case:
If a Property Editor Data Source includes Umb.PropertyEditorUi.IconPicker, as part of the configuration, it allows for selecting a color alongside the icon. When this happens, no icon appears.

How to test:
The picker-data-source example has been updated as part of the PR.

1. Run the example npm run example.
2. Set up a picker based on the Entity Data Picker - Select the Example Items (Collection) data source.
3. Check that the icons are yellow when selecting an item.

[Copilot]

Pull Request Overview

This PR updates the Collection Item Picker to support icon colors by replacing uui-icon with umb-icon in the default collection menu item renderer. The umb-icon component supports color strings in the format icon-name color-alias (e.g., icon-document yellow), while uui-icon does not.

Key changes:

• Replaced conditional uui-icon rendering logic with a single umb-icon element that handles both icon and fallback cases
• Updated example data source to demonstrate icon color functionality with yellow color

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
default-collection-menu-item.element.ts	Replaced uui-icon with umb-icon and simplified icon rendering logic using nullish coalescing operator
example-custom-picker-collection-data-source.ts	Updated example icons to include color strings for demonstration purposes

[bjarnef]

@madsrasmussen shouldn't the icon always be white for selected tree item? Otherwise to contrast would be low for e.g. blue and black icon color.

E.g. the current content tree picker in Deploy restore picker:

[nielslyngsoe]

Hi @bjarnef good point, I have fixed that over in the UI Library, so we get a general fix not a CMS specific one.
umbraco/Umbraco.UI#1222

[nielslyngsoe]

It works, and does what it should. It does then have the trouble of icon colors not being overwritten in selection state, but this will be fixed via the UI Library in near future.