Allow deselection of color picker property. (#19174)

src/Umbraco.Web.UI.Client/src/packages/property-editors/color-picker/property-editor-ui-color-picker.element.ts

@@ -17,8 +17,7 @@ export class UmbPropertyEditorUIColorPickerElement extends UmbLitElement impleme
 
 	@property({ type: Object })
 	public set value(value: UmbSwatchDetails | undefined) {
-		if (!value) return;
-		this.#value = this.#ensureHashPrefix(value);
+		this.#value = value ? this.#ensureHashPrefix(value) : undefined;
 	}
 	public get value(): UmbSwatchDetails | undefined {
 		return this.#value;