Add alt text field for image elements on Free-Form Landing Pages

When you add an image element to a Free-Form Landing Page, there is no field to add alt text to the image. In the Email Builder, this is available in the "Swap" window, but it's not available in the same spot for the Landing Pages, nor is it in the properties drop-down for the element once it's dragged on the page. This is something our company (and probably others) requires for ADA compliance.