Isaac Janzen 8226fca6ed
DEV: Update glimmer topic timeline visibility state when a post is created (#20145)
# Problem
Creating a post on a topic, where the timeline is not shown by default, does not update the visibility state dynamically. You must refresh the page to have the timeline appear. 

# Solution 
This PR hooks into the `post-stream:posted` app event and checks if we can now display the timeline after a post has been created. This will update the visibility state dynamically.
2023-02-02 14:02:51 -06:00
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