Accessibility issue raised by SiteImprove

[theconorodonnell]

Describe the bug
While validating the accessibility of a Kentico 13 bizform, the SiteImprove chrome extension accessibility checker raised a concern with the calendar picker input having no label control or aria-label attribute.

To Reproduce
Steps to reproduce the behavior:

1. Create a kentico bizform
2. Use the calendar picker form control on an input
3. place the configured bizform on a page builder page using the form widget
4. navigate to the page and use the siteimprove chrome extension to validate the accessibility of the form
5. the siteimprove tool highlights a missing form label for the calendar input

Expected behavior
The form control is accessible

Screenshots

Library Version
The issue was found while developing on Kentico v13.0.157 using the latest version of this nuget package.

Desktop (please complete the following information):

• OS: Windows 11 Pro
• Browser: Chrome
• Version: 131.0.6778.86
• SiteImprove chrome extension: version 2.0

Additional context
In reviewing the issue, it would appear that the visible label coming from kentico configuration is assigned to a hidden input, and that the flatpicker js library creates a new input on the fly with no accessible label provided.