[Designer] Carousel control will not display arrows on non Windows 11 devices

Problem Description

The Carousel control for 1.6 preview card in the Designer will only show the previous and next arrow controls on Windows 11 devices. If these are rendered in Windows 10 or Mac devices, they will see empty squares.

This is because the arrows are using fluent icons that are only included on Windows 11.
https://docs.microsoft.com/en-us/windows/apps/design/style/segoe-fluent-icons-font

Link to CI site
https://adaptivecardsci.z5.web.core.windows.net/designer

Card JSON

{
	"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
	"type": "AdaptiveCard",
	"version": "1.6",
	"body": {
		"type": "Carousel",
		"timer": 5000,
		"pages": [
			{
				"type": "CarouselPage",
				"id": "firstCarouselPage",
				"selectAction": {
					"type": "Action.OpenUrl",
					"title": "Click for more information about the first carousel page!",
					"url": "https://adaptivecards.io/"
				},
				"items": [
					{
						"type": "Image",
						"url": "https://adaptivecards.io/content/cats/1.png",
						"size": "medium"
					}
				]
			},
			{
				"type": "CarouselPage",
				"id": "theSecondCarouselPage",
				"items": [
					{
						"type": "Image",
						"url": "https://adaptivecards.io/content/cats/2.png",
						"size": "medium"
					}
				]
			},
			{
				"type": "CarouselPage",
				"id": "last-carousel-page",
				"items": [
					{
						"type": "Image",
						"url": "https://adaptivecards.io/content/cats/3.png",
						"altText": "That's a cool cat!",
						"size": "medium"
					}
				]
			}
		]
	},
	"actions": [
		{
			"type": "Action.OpenUrl",
			"title": "See more",
			"url": "https://adaptivecards.io"
		},
		{
			"type": "Action.OpenUrl",
			"title": "Another action",
			"url": "https://adaptivecards.io"
		}
	]
}

Screenshot

Windows 11:

Windows 10:

Open the Designer using the supplied Carousel card JSON and compare the arrow controls on Windows 11, Windows 10, and macOS. Inspect the Carousel control's arrow or icon entry point and the linked CI Designer; done means previous and next arrows render on all listed devices without empty squares.