## Version
18.0+

## Issue
The tour `snippet_popup_and_animations` times out when trying to wait for the last column to become "not animated and hidden". This happens because the element never actually becomes `hidden` after the scroll-triggered animation ends — it remains in the DOM and visible.

## Cause
Commit 7e85f88214b6b57db87a6c1964286f0b7813f6ff attempted to fix a selector that was always true by adding `:hidden`, assuming the element would be hidden once the scroll animation completed. But since the element’s visibility is never changed via `display: none` or `visibility: hidden`, the `:hidden` condition never matches, blocking the tour.

## Fix
Remove the `:hidden` pseudo-class from the trigger.
Instead, wait for the `.o_animating` class to be removed (indicating the end of the animation), then:
- Add a short delay to ensure animation processing is complete.
- Check that the element is outside of the viewport (scrolled out).
- Verify that `animation-delay` is approximately 0.


runbot-227077

Forward-Port-Of: odoo/odoo#215567