Add option to hide colors from icon picker

[bjarnef]

Prerequisites

• I have added steps to test this contribution in the description below

If there's an existing issue for this PR then this fixes

Description

This PR fix part of the discussion in #20647 and add the option to hide colors from icon picker, which was previously available in the old backoffice UI: #13079

It would be great if we furthermore can pass in an arrray of color/swatch modal to override the umbracoColors array, but I still think it is useful explicit to hide colors even though colors may be defined.

Example:

const modalContext = modalManager.open(this, UMB_ICON_PICKER_MODAL, {
  value: {
    icon: alias,
    color: color,
  },
  data: { hideColors: true }
});

or via configuration of Umb.PropertyEditorUi.IconPicker.

{
  alias: 'icon',
  label: 'Workspace View icon',
  description: "The icon for the Collection's Workspace View.",
  propertyEditorUiAlias: 'Umb.PropertyEditorUi.IconPicker',
  config: [
    { alias: 'placeholder', value: 'icon-grid' },
    { alias: 'hideColors', value: true },
  ],
}

[github-actions]

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[Copilot]

Pull Request Overview

This PR adds the ability to hide the color picker section in the icon picker modal, restoring functionality that existed in the old backoffice UI. This allows developers to programmatically hide colors when opening the icon picker modal by setting hideColors: true in the modal data.

Key Changes:

• Added hideColors property to the icon picker property editor and modal interfaces
• Refactored color picker rendering into a conditional renderColors() method

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
property-editor-ui-icon-picker.element.ts	Adds hideColors property and passes it to the modal data
icon-picker-modal.token.ts	Extends modal data interface with optional hideColors boolean field
icon-picker-modal.element.ts	Refactors color picker rendering into conditional method that respects hideColors flag

[Copilot]

The <hr /> separator after the search input should only render when colors are visible. Currently, it renders even when hideColors is true, creating an unnecessary visual separator. Move this line inside the renderColors() method before the color swatches to ensure it only appears when colors are shown.

[Copilot]

The explicit === true comparison is redundant since hideColors is already a boolean. Simplify to return this.data?.hideColors ? nothing : html\...` for cleaner code.

Suggested change

	return this.data?.hideColors === true
	return this.data?.hideColors