Cancel button appears to be disabled when creating a page

STEPS TO REPRODUCE

1. Click 'Create' button to create a new page
2. Observe the 'Cancel' button

 EXPECTED RESULTS

The 'Cancel' button is active.

 ACTUAL RESULTS

The 'Cancel' button appears to be grayed out, as the mouse cursor changes into a 'Stop' sign when hovered over it.

However, if clicked, the page creation is cancelled.

The issue could not be reproduced on XWiki 12.0 RC1 or on XWiki 11.10.3.