Version: 13.0

Problem:
When an overlay slide is opened and the parent slide is taller than the viewport, both the parent slide and the overlay slide scroll simultaneously when the overlay content is scrolled. This causes the user to lose focus on the overlay and disrupts the intended user experience.

Consequences:
- Confusing focus shifts between the parent slide and the overlay slide
- Weakened UX for dialogs and lightbox content
- Accessibility issues, especially for keyboard navigation

Suggestion:
- The parent slide should not scroll while the overlay slide is active and being scrolled.
- Only the overlay slide should scroll when its content exceeds the viewport height.
- If the overlay slide is smaller than the viewport, no scrolling should occur.