Isaac Janzen 277c5770b0
UX: Add transition to glimmer-topic-timeline fullscreen view (#20149)
- Rename `class` getter -> `classes` seeing that we are dealing with multiple classes
- Add `show` class to fullscreen topic timeline via `did-insert` to handle how CSS transitions only apply when an existing element changes its properties. We need to wait until `timeline-fullscreen` is painted to the DOM, and then add the `show` class later.
2023-02-02 15:00:02 -06:00
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